diff --git a/packages/live-preview/src/mergeData.ts b/packages/live-preview/src/mergeData.ts
index 5fcfd9476..6c7a367a0 100644
--- a/packages/live-preview/src/mergeData.ts
+++ b/packages/live-preview/src/mergeData.ts
@@ -48,6 +48,8 @@ export const mergeData = async <T extends Record<string, any>>(args: {
     data: {
       data: incomingData,
       depth,
+      // The incoming data already has had its locales flattened
+      flattenLocales: false,
       locale,
     },
     endpoint: encodeURI(
diff --git a/packages/payload/src/collections/endpoints/findByID.ts b/packages/payload/src/collections/endpoints/findByID.ts
index 2b3119b93..be8e8a909 100644
--- a/packages/payload/src/collections/endpoints/findByID.ts
+++ b/packages/payload/src/collections/endpoints/findByID.ts
@@ -15,6 +15,12 @@ export const findByIDHandler: PayloadHandler = async (req) => {
   const { id, collection } = getRequestCollectionWithID(req)
   const depth = data ? data.depth : searchParams.get('depth')
   const trash = data ? data.trash : searchParams.get('trash') === 'true'
+  const flattenLocales = data
+    ? data.flattenLocales
+    : searchParams.has('flattenLocales')
+      ? searchParams.get('flattenLocales') === 'true'
+      : // flattenLocales should be undefined if not provided, so that the default (true) is applied in the operation
+        undefined
 
   const result = await findByIDOperation({
     id,
@@ -26,6 +32,7 @@ export const findByIDHandler: PayloadHandler = async (req) => {
         : undefined,
     depth: isNumber(depth) ? Number(depth) : undefined,
     draft: data ? data.draft : searchParams.get('draft') === 'true',
+    flattenLocales,
     joins: sanitizeJoinParams(req.query.joins as JoinParams),
     populate: sanitizePopulateParam(req.query.populate),
     req,
diff --git a/packages/payload/src/collections/operations/findByID.ts b/packages/payload/src/collections/operations/findByID.ts
index 518a41988..8912fe56e 100644
--- a/packages/payload/src/collections/operations/findByID.ts
+++ b/packages/payload/src/collections/operations/findByID.ts
@@ -20,7 +20,7 @@ import { combineQueries } from '../../database/combineQueries.js'
 import { sanitizeJoinQuery } from '../../database/sanitizeJoinQuery.js'
 import { sanitizeWhereQuery } from '../../database/sanitizeWhereQuery.js'
 import { NotFound } from '../../errors/index.js'
-import { afterRead } from '../../fields/hooks/afterRead/index.js'
+import { afterRead, type AfterReadArgs } from '../../fields/hooks/afterRead/index.js'
 import { validateQueryPaths } from '../../index.js'
 import { lockedDocumentsCollectionSlug } from '../../locked-documents/config.js'
 import { appendNonTrashedFilter } from '../../utilities/appendNonTrashedFilter.js'
@@ -29,7 +29,7 @@ import { sanitizeSelect } from '../../utilities/sanitizeSelect.js'
 import { replaceWithDraftIfAvailable } from '../../versions/drafts/replaceWithDraftIfAvailable.js'
 import { buildAfterOperation } from './utils.js'
 
-export type Arguments = {
+export type FindByIDArgs = {
   collection: Collection
   currentDepth?: number
   /**
@@ -49,14 +49,14 @@ export type Arguments = {
   select?: SelectType
   showHiddenFields?: boolean
   trash?: boolean
-}
+} & Pick<AfterReadArgs<JsonObject>, 'flattenLocales'>
 
 export const findByIDOperation = async <
   TSlug extends CollectionSlug,
   TDisableErrors extends boolean,
   TSelect extends SelectFromCollectionSlug<TSlug>,
 >(
-  incomingArgs: Arguments,
+  incomingArgs: FindByIDArgs,
 ): Promise<ApplyDisableErrors<TransformCollectionWithSelect<TSlug, TSelect>, TDisableErrors>> => {
   let args = incomingArgs
 
@@ -85,6 +85,7 @@ export const findByIDOperation = async <
       depth,
       disableErrors,
       draft: draftEnabled = false,
+      flattenLocales,
       includeLockStatus,
       joins,
       overrideAccess = false,
@@ -279,6 +280,7 @@ export const findByIDOperation = async <
       doc: result,
       draft: draftEnabled,
       fallbackLocale: fallbackLocale!,
+      flattenLocales,
       global: null,
       locale: locale!,
       overrideAccess,
diff --git a/packages/payload/src/collections/operations/local/findByID.ts b/packages/payload/src/collections/operations/local/findByID.ts
index 0df8cc5a5..a576f1fbd 100644
--- a/packages/payload/src/collections/operations/local/findByID.ts
+++ b/packages/payload/src/collections/operations/local/findByID.ts
@@ -18,7 +18,7 @@ import type { SelectFromCollectionSlug } from '../../config/types.js'
 
 import { APIError } from '../../../errors/index.js'
 import { createLocalReq } from '../../../utilities/createLocalReq.js'
-import { findByIDOperation } from '../findByID.js'
+import { type FindByIDArgs, findByIDOperation } from '../findByID.js'
 
 export type Options<
   TSlug extends CollectionSlug,
@@ -117,7 +117,7 @@ export type Options<
    * If you set `overrideAccess` to `false`, you can pass a user to use against the access control checks.
    */
   user?: Document
-}
+} & Pick<FindByIDArgs, 'flattenLocales'>
 
 export async function findByIDLocal<
   TSlug extends CollectionSlug,
@@ -135,6 +135,7 @@ export async function findByIDLocal<
     depth,
     disableErrors = false,
     draft = false,
+    flattenLocales,
     includeLockStatus,
     joins,
     overrideAccess = true,
@@ -160,6 +161,7 @@ export async function findByIDLocal<
     depth,
     disableErrors,
     draft,
+    flattenLocales,
     includeLockStatus,
     joins,
     overrideAccess,
diff --git a/packages/payload/src/fields/hooks/afterRead/index.ts b/packages/payload/src/fields/hooks/afterRead/index.ts
index 9b5e6506c..9f5d8db92 100644
--- a/packages/payload/src/fields/hooks/afterRead/index.ts
+++ b/packages/payload/src/fields/hooks/afterRead/index.ts
@@ -6,7 +6,7 @@ import type { JsonObject, PayloadRequest, PopulateType, SelectType } from '../..
 import { getSelectMode } from '../../../utilities/getSelectMode.js'
 import { traverseFields } from './traverseFields.js'
 
-type Args<T extends JsonObject> = {
+export type AfterReadArgs<T extends JsonObject> = {
   collection: null | SanitizedCollectionConfig
   context: RequestContext
   currentDepth?: number
@@ -15,6 +15,12 @@ type Args<T extends JsonObject> = {
   draft: boolean
   fallbackLocale: null | string
   findMany?: boolean
+  /**
+   * Controls whether locales should be flattened into the requested locale.
+   * E.g.: { [locale]: fields } -> fields
+   *
+   * @default true
+   */
   flattenLocales?: boolean
   global: null | SanitizedGlobalConfig
   locale: string
@@ -35,7 +41,7 @@ type Args<T extends JsonObject> = {
  * - Populate relationships
  */
 
-export async function afterRead<T extends JsonObject>(args: Args<T>): Promise<T> {
+export async function afterRead<T extends JsonObject>(args: AfterReadArgs<T>): Promise<T> {
   const {
     collection,
     context,
diff --git a/packages/payload/src/fields/hooks/afterRead/promise.ts b/packages/payload/src/fields/hooks/afterRead/promise.ts
index 04957f233..02b3b32e4 100644
--- a/packages/payload/src/fields/hooks/afterRead/promise.ts
+++ b/packages/payload/src/fields/hooks/afterRead/promise.ts
@@ -9,6 +9,7 @@ import type {
   SelectType,
 } from '../../../types/index.js'
 import type { Block, Field, TabAsField } from '../../config/types.js'
+import type { AfterReadArgs } from './index.js'
 
 import { MissingEditorProp } from '../../../errors/index.js'
 import { type RequestContext } from '../../../index.js'
@@ -40,7 +41,6 @@ type Args = {
    */
   fieldPromises: Promise<void>[]
   findMany: boolean
-  flattenLocales: boolean
   global: null | SanitizedGlobalConfig
   locale: null | string
   overrideAccess: boolean
@@ -61,7 +61,7 @@ type Args = {
   siblingFields?: (Field | TabAsField)[]
   triggerAccessControl?: boolean
   triggerHooks?: boolean
-}
+} & Required<Pick<AfterReadArgs<JsonObject>, 'flattenLocales'>>
 
 // This function is responsible for the following actions, in order:
 // - Remove hidden fields from response
@@ -236,15 +236,23 @@ export const promise = async ({
     }
   }
 
+  // If locale is `all`, siblingDoc[field.name] will be an object mapping locales to values - locales won't be flattened.
+  // In this case, run the hook for each locale and value pair
+  const shouldRunHookOnAllLocales =
+    locale === 'all' &&
+    'name' in field &&
+    typeof field.name === 'string' &&
+    // If localized values were hoisted, siblingDoc[field.name] will not be an object mapping locales to values
+    // => Object.entries(siblingDoc[field.name]) will be the value of a single locale, not all locales
+    // => do not run the hook for each locale
+    !shouldHoistLocalizedValue &&
+    fieldShouldBeLocalized({ field, parentIsLocalized: parentIsLocalized! }) &&
+    typeof siblingDoc[field.name] === 'object'
+
   if (fieldAffectsDataResult) {
     // Execute hooks
     if (triggerHooks && 'hooks' in field && field.hooks?.afterRead) {
       for (const hook of field.hooks.afterRead) {
-        const shouldRunHookOnAllLocales =
-          fieldShouldBeLocalized({ field, parentIsLocalized: parentIsLocalized! }) &&
-          (locale === 'all' || !flattenLocales) &&
-          typeof siblingDoc[field.name] === 'object'
-
         if (shouldRunHookOnAllLocales) {
           const localesAndValues = Object.entries(siblingDoc[field.name])
           await Promise.all(
@@ -711,11 +719,6 @@ export const promise = async ({
 
       if (editor?.hooks?.afterRead?.length) {
         for (const hook of editor.hooks.afterRead) {
-          const shouldRunHookOnAllLocales =
-            fieldShouldBeLocalized({ field, parentIsLocalized: parentIsLocalized! }) &&
-            (locale === 'all' || !flattenLocales) &&
-            typeof siblingDoc[field.name] === 'object'
-
           if (shouldRunHookOnAllLocales) {
             const localesAndValues = Object.entries(siblingDoc[field.name])
 
diff --git a/packages/payload/src/globals/endpoints/findOne.ts b/packages/payload/src/globals/endpoints/findOne.ts
index 0b051e7fe..eb0645559 100644
--- a/packages/payload/src/globals/endpoints/findOne.ts
+++ b/packages/payload/src/globals/endpoints/findOne.ts
@@ -13,6 +13,12 @@ export const findOneHandler: PayloadHandler = async (req) => {
   const globalConfig = getRequestGlobal(req)
   const { data, searchParams } = req
   const depth = data ? data.depth : searchParams.get('depth')
+  const flattenLocales = data
+    ? data.flattenLocales
+    : searchParams.has('flattenLocales')
+      ? searchParams.get('flattenLocales') === 'true'
+      : // flattenLocales should be undfined if not provided, so that the default (true) is applied in the operation
+        undefined
 
   const result = await findOneOperation({
     slug: globalConfig.slug,
@@ -23,6 +29,7 @@ export const findOneHandler: PayloadHandler = async (req) => {
         : undefined,
     depth: isNumber(depth) ? Number(depth) : undefined,
     draft: data ? data.draft : searchParams.get('draft') === 'true',
+    flattenLocales,
     globalConfig,
     populate: sanitizePopulateParam(req.query.populate),
     req,
diff --git a/packages/payload/src/globals/operations/findOne.ts b/packages/payload/src/globals/operations/findOne.ts
index 5e4536c74..fc817bbd1 100644
--- a/packages/payload/src/globals/operations/findOne.ts
+++ b/packages/payload/src/globals/operations/findOne.ts
@@ -9,14 +9,14 @@ import type {
 import type { SanitizedGlobalConfig } from '../config/types.js'
 
 import { executeAccess } from '../../auth/executeAccess.js'
-import { afterRead } from '../../fields/hooks/afterRead/index.js'
+import { afterRead, type AfterReadArgs } from '../../fields/hooks/afterRead/index.js'
 import { lockedDocumentsCollectionSlug } from '../../locked-documents/config.js'
 import { getSelectMode } from '../../utilities/getSelectMode.js'
 import { killTransaction } from '../../utilities/killTransaction.js'
 import { sanitizeSelect } from '../../utilities/sanitizeSelect.js'
 import { replaceWithDraftIfAvailable } from '../../versions/drafts/replaceWithDraftIfAvailable.js'
 
-type Args = {
+export type GlobalFindOneArgs = {
   /**
    * You may pass the document data directly which will skip the `db.findOne` database query.
    * This is useful if you want to use this endpoint solely for running hooks and populating data.
@@ -32,15 +32,16 @@ type Args = {
   select?: SelectType
   showHiddenFields?: boolean
   slug: string
-}
+} & Pick<AfterReadArgs<JsonObject>, 'flattenLocales'>
 
 export const findOneOperation = async <T extends Record<string, unknown>>(
-  args: Args,
+  args: GlobalFindOneArgs,
 ): Promise<T> => {
   const {
     slug,
     depth,
     draft: draftEnabled = false,
+    flattenLocales,
     globalConfig,
     includeLockStatus,
     overrideAccess = false,
@@ -206,6 +207,7 @@ export const findOneOperation = async <T extends Record<string, unknown>>(
       doc,
       draft: draftEnabled,
       fallbackLocale: fallbackLocale!,
+      flattenLocales,
       global: globalConfig,
       locale: locale!,
       overrideAccess,
diff --git a/packages/payload/src/globals/operations/local/findOne.ts b/packages/payload/src/globals/operations/local/findOne.ts
index bae582cdf..f82b55466 100644
--- a/packages/payload/src/globals/operations/local/findOne.ts
+++ b/packages/payload/src/globals/operations/local/findOne.ts
@@ -11,7 +11,7 @@ import type { SelectFromGlobalSlug } from '../../config/types.js'
 
 import { APIError } from '../../../errors/index.js'
 import { createLocalReq } from '../../../utilities/createLocalReq.js'
-import { findOneOperation } from '../findOne.js'
+import { findOneOperation, type GlobalFindOneArgs } from '../findOne.js'
 
 export type Options<TSlug extends GlobalSlug, TSelect extends SelectType> = {
   /**
@@ -78,7 +78,7 @@ export type Options<TSlug extends GlobalSlug, TSelect extends SelectType> = {
    * If you set `overrideAccess` to `false`, you can pass a user to use against the access control checks.
    */
   user?: Document
-}
+} & Pick<GlobalFindOneArgs, 'flattenLocales'>
 
 export async function findOneGlobalLocal<
   TSlug extends GlobalSlug,
@@ -92,6 +92,7 @@ export async function findOneGlobalLocal<
     data,
     depth,
     draft = false,
+    flattenLocales,
     includeLockStatus,
     overrideAccess = true,
     populate,
@@ -110,6 +111,7 @@ export async function findOneGlobalLocal<
     data,
     depth,
     draft,
+    flattenLocales,
     globalConfig,
     includeLockStatus,
     overrideAccess,
diff --git a/test/live-preview/app/live-preview/_blocks/Relationships/index.tsx b/test/live-preview/app/live-preview/_blocks/Relationships/index.tsx
index 20a53d10e..9926578d0 100644
--- a/test/live-preview/app/live-preview/_blocks/Relationships/index.tsx
+++ b/test/live-preview/app/live-preview/_blocks/Relationships/index.tsx
@@ -31,6 +31,12 @@ export const RelationshipsBlock: React.FC<RelationshipsBlockProps> = (props) =>
         {data?.richTextLexical && (
           <RichText content={data.richTextLexical} renderUploadFilenameOnly />
         )}
+        <p>
+          <b>Rich Text — Lexical — Localized:</b>
+        </p>
+        {data?.richTextLexicalLocalized && (
+          <RichText content={data.richTextLexicalLocalized} renderUploadFilenameOnly />
+        )}
         <p>
           <b>Upload:</b>
         </p>
diff --git a/test/live-preview/collections/Pages.ts b/test/live-preview/collections/Pages.ts
index dd24a56fa..6d73c8dce 100644
--- a/test/live-preview/collections/Pages.ts
+++ b/test/live-preview/collections/Pages.ts
@@ -92,6 +92,18 @@ export const Pages: CollectionConfig = {
                 ],
               }),
             },
+            {
+              label: 'Rich Text — Lexical — Localized',
+              type: 'richText',
+              name: 'richTextLexicalLocalized',
+              localized: true,
+              editor: lexicalEditor({
+                features: ({ defaultFeatures }) => [
+                  ...defaultFeatures,
+                  BlocksFeature({ blocks: ['mediaBlock'] }),
+                ],
+              }),
+            },
             {
               name: 'relationshipAsUpload',
               type: 'upload',
diff --git a/test/live-preview/int.spec.ts b/test/live-preview/int.spec.ts
index af338f8e8..72c818530 100644
--- a/test/live-preview/int.spec.ts
+++ b/test/live-preview/int.spec.ts
@@ -129,7 +129,13 @@ describe('Collections - Live Preview', () => {
       } as MessageEvent as LivePreviewMessageEvent<Page>,
       initialData: {
         title: 'Test Page',
-        id: 1,
+        id: 1 as number | string,
+        createdAt: new Date().toISOString(),
+        updatedAt: new Date().toISOString(),
+        hero: {
+          type: 'highImpact',
+        },
+        slug: 'testPage',
       } as Page,
     })
 
@@ -177,6 +183,24 @@ describe('Collections - Live Preview', () => {
     expect(mergedData.title).toEqual('Test Page (Changed)')
   })
 
+  it('— strings - merges localized data', async () => {
+    const initialData = await createPageWithInitialData({
+      title: 'Test Page',
+    })
+
+    const mergedData = await mergeData({
+      depth: 1,
+      incomingData: {
+        ...initialData,
+        localizedTitle: 'Test Page (Changed)',
+      },
+      initialData,
+      collectionSlug: pagesSlug,
+    })
+
+    expect(mergedData.localizedTitle).toEqual('Test Page (Changed)')
+  })
+
   it('— arrays - can clear all rows', async () => {
     const initialData = await createPageWithInitialData({
       title: 'Test Page',
@@ -751,7 +775,7 @@ describe('Collections - Live Preview', () => {
     expect(merge2.richTextSlate[3].value).toMatchObject(media)
   })
 
-  it('— relationships - populates within Lexical rich text editor', async () => {
+  async function lexicalTest(fieldName: string) {
     const initialData = await createPageWithInitialData({
       title: 'Test Page',
     })
@@ -762,7 +786,7 @@ describe('Collections - Live Preview', () => {
       collectionSlug: pagesSlug,
       incomingData: {
         ...initialData,
-        richTextLexical: {
+        [fieldName]: {
           root: {
             type: 'root',
             format: '',
@@ -804,12 +828,12 @@ describe('Collections - Live Preview', () => {
       initialData,
     })
 
-    expect(merge1.richTextLexical.root.children).toHaveLength(3)
-    expect(merge1.richTextLexical.root.children[0].type).toEqual('relationship')
-    expect(merge1.richTextLexical.root.children[0].value).toMatchObject(testPost)
-    expect(merge1.richTextLexical.root.children[1].type).toEqual('paragraph')
-    expect(merge1.richTextLexical.root.children[2].type).toEqual('upload')
-    expect(merge1.richTextLexical.root.children[2].value).toMatchObject(media)
+    expect(merge1[fieldName].root.children).toHaveLength(3)
+    expect(merge1[fieldName].root.children[0].type).toEqual('relationship')
+    expect(merge1[fieldName].root.children[0].value).toMatchObject(testPost)
+    expect(merge1[fieldName].root.children[1].type).toEqual('paragraph')
+    expect(merge1[fieldName].root.children[2].type).toEqual('upload')
+    expect(merge1[fieldName].root.children[2].value).toMatchObject(media)
 
     // Add a node before the populated one
     const merge2 = await mergeData({
@@ -817,7 +841,7 @@ describe('Collections - Live Preview', () => {
       collectionSlug: pagesSlug,
       incomingData: {
         ...merge1,
-        richTextLexical: {
+        [fieldName]: {
           root: {
             type: 'root',
             format: '',
@@ -867,13 +891,23 @@ describe('Collections - Live Preview', () => {
       initialData: merge1,
     })
 
-    expect(merge2.richTextLexical.root.children).toHaveLength(4)
-    expect(merge2.richTextLexical.root.children[0].type).toEqual('relationship')
-    expect(merge2.richTextLexical.root.children[0].value).toMatchObject(testPost)
-    expect(merge2.richTextLexical.root.children[1].type).toEqual('paragraph')
-    expect(merge2.richTextLexical.root.children[2].type).toEqual('paragraph')
-    expect(merge2.richTextLexical.root.children[3].type).toEqual('upload')
-    expect(merge2.richTextLexical.root.children[3].value).toMatchObject(media)
+    expect(merge2[fieldName].root.children).toHaveLength(4)
+    expect(merge2[fieldName].root.children[0].type).toEqual('relationship')
+    expect(merge2[fieldName].root.children[0].value).toMatchObject(testPost)
+    expect(merge2[fieldName].root.children[1].type).toEqual('paragraph')
+    expect(merge2[fieldName].root.children[2].type).toEqual('paragraph')
+    expect(merge2[fieldName].root.children[3].type).toEqual('upload')
+    expect(merge2[fieldName].root.children[3].value).toMatchObject(media)
+  }
+
+  // eslint-disable-next-line jest/expect-expect
+  it('— relationships - populates within Lexical rich text editor', async () => {
+    await lexicalTest('richTextLexical')
+  })
+
+  // eslint-disable-next-line jest/expect-expect
+  it('— relationships - populates within Localized Lexical rich text editor', async () => {
+    await lexicalTest('richTextLexicalLocalized')
   })
 
   it('— relationships - re-populates externally updated relationships', async () => {
diff --git a/test/live-preview/payload-types.ts b/test/live-preview/payload-types.ts
index 0959a2c3e..a09cca017 100644
--- a/test/live-preview/payload-types.ts
+++ b/test/live-preview/payload-types.ts
@@ -98,7 +98,7 @@ export interface Config {
     'payload-migrations': PayloadMigrationsSelect<false> | PayloadMigrationsSelect<true>;
   };
   db: {
-    defaultIDType: number;
+    defaultIDType: string;
   };
   globals: {
     header: Header;
@@ -142,7 +142,7 @@ export interface UserAuthOperations {
 export interface MediaBlock {
   invertBackground?: boolean | null;
   position?: ('default' | 'fullscreen') | null;
-  media: number | Media;
+  media: string | Media;
   id?: string | null;
   blockName?: string | null;
   blockType: 'mediaBlock';
@@ -152,7 +152,7 @@ export interface MediaBlock {
  * via the `definition` "media".
  */
 export interface Media {
-  id: number;
+  id: string;
   alt: string;
   updatedAt: string;
   createdAt: string;
@@ -171,7 +171,7 @@ export interface Media {
  * via the `definition` "users".
  */
 export interface User {
-  id: number;
+  id: string;
   updatedAt: string;
   createdAt: string;
   email: string;
@@ -195,9 +195,9 @@ export interface User {
  * via the `definition` "pages".
  */
 export interface Page {
-  id: number;
+  id: string;
   slug: string;
-  tenant?: (number | null) | Tenant;
+  tenant?: (string | null) | Tenant;
   title: string;
   hero: {
     type: 'none' | 'highImpact' | 'lowImpact';
@@ -206,7 +206,7 @@ export interface Page {
           [k: string]: unknown;
         }[]
       | null;
-    media?: (number | null) | Media;
+    media?: (string | null) | Media;
   };
   layout?:
     | (
@@ -225,11 +225,11 @@ export interface Page {
                     reference?:
                       | ({
                           relationTo: 'posts';
-                          value: number | Post;
+                          value: string | Post;
                         } | null)
                       | ({
                           relationTo: 'pages';
-                          value: number | Page;
+                          value: string | Page;
                         } | null);
                     url?: string | null;
                     label: string;
@@ -262,11 +262,11 @@ export interface Page {
                     reference?:
                       | ({
                           relationTo: 'posts';
-                          value: number | Post;
+                          value: string | Post;
                         } | null)
                       | ({
                           relationTo: 'pages';
-                          value: number | Page;
+                          value: string | Page;
                         } | null);
                     url?: string | null;
                     label: string;
@@ -285,7 +285,7 @@ export interface Page {
         | {
             invertBackground?: boolean | null;
             position?: ('default' | 'fullscreen') | null;
-            media: number | Media;
+            media: string | Media;
             id?: string | null;
             blockName?: string | null;
             blockType: 'mediaBlock';
@@ -298,12 +298,12 @@ export interface Page {
               | null;
             populateBy?: ('collection' | 'selection') | null;
             relationTo?: 'posts' | null;
-            categories?: (number | Category)[] | null;
+            categories?: (string | Category)[] | null;
             limit?: number | null;
             selectedDocs?:
               | {
                   relationTo: 'posts';
-                  value: number | Post;
+                  value: string | Post;
                 }[]
               | null;
             /**
@@ -312,7 +312,7 @@ export interface Page {
             populatedDocs?:
               | {
                   relationTo: 'posts';
-                  value: number | Post;
+                  value: string | Post;
                 }[]
               | null;
             /**
@@ -326,7 +326,7 @@ export interface Page {
       )[]
     | null;
   localizedTitle?: string | null;
-  relationToLocalized?: (number | null) | Post;
+  relationToLocalized?: (string | null) | Post;
   richTextSlate?:
     | {
         [k: string]: unknown;
@@ -347,22 +347,37 @@ export interface Page {
     };
     [k: string]: unknown;
   } | null;
-  relationshipAsUpload?: (number | null) | Media;
-  relationshipMonoHasOne?: (number | null) | Post;
-  relationshipMonoHasMany?: (number | Post)[] | null;
+  richTextLexicalLocalized?: {
+    root: {
+      type: string;
+      children: {
+        type: string;
+        version: number;
+        [k: string]: unknown;
+      }[];
+      direction: ('ltr' | 'rtl') | null;
+      format: 'left' | 'start' | 'center' | 'right' | 'end' | 'justify' | '';
+      indent: number;
+      version: number;
+    };
+    [k: string]: unknown;
+  } | null;
+  relationshipAsUpload?: (string | null) | Media;
+  relationshipMonoHasOne?: (string | null) | Post;
+  relationshipMonoHasMany?: (string | Post)[] | null;
   relationshipPolyHasOne?: {
     relationTo: 'posts';
-    value: number | Post;
+    value: string | Post;
   } | null;
   relationshipPolyHasMany?:
     | {
         relationTo: 'posts';
-        value: number | Post;
+        value: string | Post;
       }[]
     | null;
   arrayOfRelationships?:
     | {
-        uploadInArray?: (number | null) | Media;
+        uploadInArray?: (string | null) | Media;
         richTextInArray?: {
           root: {
             type: string;
@@ -378,28 +393,28 @@ export interface Page {
           };
           [k: string]: unknown;
         } | null;
-        relationshipInArrayMonoHasOne?: (number | null) | Post;
-        relationshipInArrayMonoHasMany?: (number | Post)[] | null;
+        relationshipInArrayMonoHasOne?: (string | null) | Post;
+        relationshipInArrayMonoHasMany?: (string | Post)[] | null;
         relationshipInArrayPolyHasOne?: {
           relationTo: 'posts';
-          value: number | Post;
+          value: string | Post;
         } | null;
         relationshipInArrayPolyHasMany?:
           | {
               relationTo: 'posts';
-              value: number | Post;
+              value: string | Post;
             }[]
           | null;
         id?: string | null;
       }[]
     | null;
   tab?: {
-    relationshipInTab?: (number | null) | Post;
+    relationshipInTab?: (string | null) | Post;
   };
   meta?: {
     title?: string | null;
     description?: string | null;
-    image?: (number | null) | Media;
+    image?: (string | null) | Media;
   };
   updatedAt: string;
   createdAt: string;
@@ -409,7 +424,7 @@ export interface Page {
  * via the `definition` "tenants".
  */
 export interface Tenant {
-  id: number;
+  id: string;
   title: string;
   clientURL: string;
   updatedAt: string;
@@ -420,9 +435,9 @@ export interface Tenant {
  * via the `definition` "posts".
  */
 export interface Post {
-  id: number;
+  id: string;
   slug: string;
-  tenant?: (number | null) | Tenant;
+  tenant?: (string | null) | Tenant;
   title: string;
   hero: {
     type: 'none' | 'highImpact' | 'lowImpact';
@@ -431,7 +446,7 @@ export interface Post {
           [k: string]: unknown;
         }[]
       | null;
-    media?: (number | null) | Media;
+    media?: (string | null) | Media;
   };
   layout?:
     | (
@@ -450,11 +465,11 @@ export interface Post {
                     reference?:
                       | ({
                           relationTo: 'posts';
-                          value: number | Post;
+                          value: string | Post;
                         } | null)
                       | ({
                           relationTo: 'pages';
-                          value: number | Page;
+                          value: string | Page;
                         } | null);
                     url?: string | null;
                     label: string;
@@ -487,11 +502,11 @@ export interface Post {
                     reference?:
                       | ({
                           relationTo: 'posts';
-                          value: number | Post;
+                          value: string | Post;
                         } | null)
                       | ({
                           relationTo: 'pages';
-                          value: number | Page;
+                          value: string | Page;
                         } | null);
                     url?: string | null;
                     label: string;
@@ -510,7 +525,7 @@ export interface Post {
         | {
             invertBackground?: boolean | null;
             position?: ('default' | 'fullscreen') | null;
-            media: number | Media;
+            media: string | Media;
             id?: string | null;
             blockName?: string | null;
             blockType: 'mediaBlock';
@@ -523,12 +538,12 @@ export interface Post {
               | null;
             populateBy?: ('collection' | 'selection') | null;
             relationTo?: 'posts' | null;
-            categories?: (number | Category)[] | null;
+            categories?: (string | Category)[] | null;
             limit?: number | null;
             selectedDocs?:
               | {
                   relationTo: 'posts';
-                  value: number | Post;
+                  value: string | Post;
                 }[]
               | null;
             /**
@@ -537,7 +552,7 @@ export interface Post {
             populatedDocs?:
               | {
                   relationTo: 'posts';
-                  value: number | Post;
+                  value: string | Post;
                 }[]
               | null;
             /**
@@ -550,12 +565,12 @@ export interface Post {
           }
       )[]
     | null;
-  relatedPosts?: (number | Post)[] | null;
+  relatedPosts?: (string | Post)[] | null;
   localizedTitle?: string | null;
   meta?: {
     title?: string | null;
     description?: string | null;
-    image?: (number | null) | Media;
+    image?: (string | null) | Media;
   };
   updatedAt: string;
   createdAt: string;
@@ -566,7 +581,7 @@ export interface Post {
  * via the `definition` "categories".
  */
 export interface Category {
-  id: number;
+  id: string;
   title?: string | null;
   updatedAt: string;
   createdAt: string;
@@ -576,9 +591,9 @@ export interface Category {
  * via the `definition` "ssr".
  */
 export interface Ssr {
-  id: number;
+  id: string;
   slug: string;
-  tenant?: (number | null) | Tenant;
+  tenant?: (string | null) | Tenant;
   title: string;
   hero: {
     type: 'none' | 'highImpact' | 'lowImpact';
@@ -587,7 +602,7 @@ export interface Ssr {
           [k: string]: unknown;
         }[]
       | null;
-    media?: (number | null) | Media;
+    media?: (string | null) | Media;
   };
   layout?:
     | (
@@ -606,11 +621,11 @@ export interface Ssr {
                     reference?:
                       | ({
                           relationTo: 'posts';
-                          value: number | Post;
+                          value: string | Post;
                         } | null)
                       | ({
                           relationTo: 'pages';
-                          value: number | Page;
+                          value: string | Page;
                         } | null);
                     url?: string | null;
                     label: string;
@@ -643,11 +658,11 @@ export interface Ssr {
                     reference?:
                       | ({
                           relationTo: 'posts';
-                          value: number | Post;
+                          value: string | Post;
                         } | null)
                       | ({
                           relationTo: 'pages';
-                          value: number | Page;
+                          value: string | Page;
                         } | null);
                     url?: string | null;
                     label: string;
@@ -666,7 +681,7 @@ export interface Ssr {
         | {
             invertBackground?: boolean | null;
             position?: ('default' | 'fullscreen') | null;
-            media: number | Media;
+            media: string | Media;
             id?: string | null;
             blockName?: string | null;
             blockType: 'mediaBlock';
@@ -679,12 +694,12 @@ export interface Ssr {
               | null;
             populateBy?: ('collection' | 'selection') | null;
             relationTo?: 'posts' | null;
-            categories?: (number | Category)[] | null;
+            categories?: (string | Category)[] | null;
             limit?: number | null;
             selectedDocs?:
               | {
                   relationTo: 'posts';
-                  value: number | Post;
+                  value: string | Post;
                 }[]
               | null;
             /**
@@ -693,7 +708,7 @@ export interface Ssr {
             populatedDocs?:
               | {
                   relationTo: 'posts';
-                  value: number | Post;
+                  value: string | Post;
                 }[]
               | null;
             /**
@@ -709,7 +724,7 @@ export interface Ssr {
   meta?: {
     title?: string | null;
     description?: string | null;
-    image?: (number | null) | Media;
+    image?: (string | null) | Media;
   };
   updatedAt: string;
   createdAt: string;
@@ -719,9 +734,9 @@ export interface Ssr {
  * via the `definition` "ssr-autosave".
  */
 export interface SsrAutosave {
-  id: number;
+  id: string;
   slug: string;
-  tenant?: (number | null) | Tenant;
+  tenant?: (string | null) | Tenant;
   title: string;
   hero: {
     type: 'none' | 'highImpact' | 'lowImpact';
@@ -730,7 +745,7 @@ export interface SsrAutosave {
           [k: string]: unknown;
         }[]
       | null;
-    media?: (number | null) | Media;
+    media?: (string | null) | Media;
   };
   layout?:
     | (
@@ -749,11 +764,11 @@ export interface SsrAutosave {
                     reference?:
                       | ({
                           relationTo: 'posts';
-                          value: number | Post;
+                          value: string | Post;
                         } | null)
                       | ({
                           relationTo: 'pages';
-                          value: number | Page;
+                          value: string | Page;
                         } | null);
                     url?: string | null;
                     label: string;
@@ -786,11 +801,11 @@ export interface SsrAutosave {
                     reference?:
                       | ({
                           relationTo: 'posts';
-                          value: number | Post;
+                          value: string | Post;
                         } | null)
                       | ({
                           relationTo: 'pages';
-                          value: number | Page;
+                          value: string | Page;
                         } | null);
                     url?: string | null;
                     label: string;
@@ -809,7 +824,7 @@ export interface SsrAutosave {
         | {
             invertBackground?: boolean | null;
             position?: ('default' | 'fullscreen') | null;
-            media: number | Media;
+            media: string | Media;
             id?: string | null;
             blockName?: string | null;
             blockType: 'mediaBlock';
@@ -822,12 +837,12 @@ export interface SsrAutosave {
               | null;
             populateBy?: ('collection' | 'selection') | null;
             relationTo?: 'posts' | null;
-            categories?: (number | Category)[] | null;
+            categories?: (string | Category)[] | null;
             limit?: number | null;
             selectedDocs?:
               | {
                   relationTo: 'posts';
-                  value: number | Post;
+                  value: string | Post;
                 }[]
               | null;
             /**
@@ -836,7 +851,7 @@ export interface SsrAutosave {
             populatedDocs?:
               | {
                   relationTo: 'posts';
-                  value: number | Post;
+                  value: string | Post;
                 }[]
               | null;
             /**
@@ -852,7 +867,7 @@ export interface SsrAutosave {
   meta?: {
     title?: string | null;
     description?: string | null;
-    image?: (number | null) | Media;
+    image?: (string | null) | Media;
   };
   updatedAt: string;
   createdAt: string;
@@ -865,7 +880,7 @@ export interface SsrAutosave {
  * via the `definition` "collection-level-config".
  */
 export interface CollectionLevelConfig {
-  id: number;
+  id: string;
   title?: string | null;
   updatedAt: string;
   createdAt: string;
@@ -875,48 +890,48 @@ export interface CollectionLevelConfig {
  * via the `definition` "payload-locked-documents".
  */
 export interface PayloadLockedDocument {
-  id: number;
+  id: string;
   document?:
     | ({
         relationTo: 'users';
-        value: number | User;
+        value: string | User;
       } | null)
     | ({
         relationTo: 'pages';
-        value: number | Page;
+        value: string | Page;
       } | null)
     | ({
         relationTo: 'posts';
-        value: number | Post;
+        value: string | Post;
       } | null)
     | ({
         relationTo: 'ssr';
-        value: number | Ssr;
+        value: string | Ssr;
       } | null)
     | ({
         relationTo: 'ssr-autosave';
-        value: number | SsrAutosave;
+        value: string | SsrAutosave;
       } | null)
     | ({
         relationTo: 'tenants';
-        value: number | Tenant;
+        value: string | Tenant;
       } | null)
     | ({
         relationTo: 'categories';
-        value: number | Category;
+        value: string | Category;
       } | null)
     | ({
         relationTo: 'media';
-        value: number | Media;
+        value: string | Media;
       } | null)
     | ({
         relationTo: 'collection-level-config';
-        value: number | CollectionLevelConfig;
+        value: string | CollectionLevelConfig;
       } | null);
   globalSlug?: string | null;
   user: {
     relationTo: 'users';
-    value: number | User;
+    value: string | User;
   };
   updatedAt: string;
   createdAt: string;
@@ -926,10 +941,10 @@ export interface PayloadLockedDocument {
  * via the `definition` "payload-preferences".
  */
 export interface PayloadPreference {
-  id: number;
+  id: string;
   user: {
     relationTo: 'users';
-    value: number | User;
+    value: string | User;
   };
   key?: string | null;
   value?:
@@ -949,7 +964,7 @@ export interface PayloadPreference {
  * via the `definition` "payload-migrations".
  */
 export interface PayloadMigration {
-  id: number;
+  id: string;
   name?: string | null;
   batch?: number | null;
   updatedAt: string;
@@ -1071,6 +1086,7 @@ export interface PagesSelect<T extends boolean = true> {
   relationToLocalized?: T;
   richTextSlate?: T;
   richTextLexical?: T;
+  richTextLexicalLocalized?: T;
   relationshipAsUpload?: T;
   relationshipMonoHasOne?: T;
   relationshipMonoHasMany?: T;
@@ -1489,7 +1505,7 @@ export interface PayloadMigrationsSelect<T extends boolean = true> {
  * via the `definition` "header".
  */
 export interface Header {
-  id: number;
+  id: string;
   navItems?:
     | {
         link: {
@@ -1498,11 +1514,11 @@ export interface Header {
           reference?:
             | ({
                 relationTo: 'posts';
-                value: number | Post;
+                value: string | Post;
               } | null)
             | ({
                 relationTo: 'pages';
-                value: number | Page;
+                value: string | Page;
               } | null);
           url?: string | null;
           label: string;
@@ -1522,7 +1538,7 @@ export interface Header {
  * via the `definition` "footer".
  */
 export interface Footer {
-  id: number;
+  id: string;
   navItems?:
     | {
         link: {
@@ -1531,11 +1547,11 @@ export interface Footer {
           reference?:
             | ({
                 relationTo: 'posts';
-                value: number | Post;
+                value: string | Post;
               } | null)
             | ({
                 relationTo: 'pages';
-                value: number | Page;
+                value: string | Page;
               } | null);
           url?: string | null;
           label: string;
diff --git a/test/live-preview/seed/home.ts b/test/live-preview/seed/home.ts
index 3814020b0..99d16e180 100644
--- a/test/live-preview/seed/home.ts
+++ b/test/live-preview/seed/home.ts
@@ -9,6 +9,7 @@ export const home: Omit<Page, 'createdAt' | 'id' | 'updatedAt'> = {
     description: 'This is an example of live preview on a page.',
   },
   tenant: '{{TENANT_1_ID}}',
+  localizedTitle: 'Localized Title',
   hero: {
     type: 'highImpact',
     richText: [
@@ -169,6 +170,35 @@ export const home: Omit<Page, 'createdAt' | 'id' | 'updatedAt'> = {
       direction: null,
     },
   },
+  richTextLexicalLocalized: {
+    root: {
+      type: 'root',
+      format: '',
+      indent: 0,
+      version: 1,
+      children: [
+        {
+          children: [],
+          direction: null,
+          format: '',
+          indent: 0,
+          type: 'paragraph',
+          version: 1,
+        },
+        {
+          format: '',
+          type: 'upload',
+          version: 1,
+          fields: null,
+          relationTo: 'media',
+          value: {
+            id: '{{MEDIA_ID}}',
+          },
+        },
+      ],
+      direction: null,
+    },
+  },
   relationshipMonoHasMany: ['{{POST_1_ID}}'],
   relationshipMonoHasOne: '{{POST_1_ID}}',
   relationshipPolyHasMany: [{ relationTo: 'posts', value: '{{POST_1_ID}}' }],