diff --git a/apps/readest-app/src/app/reader/components/annotator/Annotator.tsx b/apps/readest-app/src/app/reader/components/annotator/Annotator.tsx
index e0f932d6..9bf58259 100644
--- a/apps/readest-app/src/app/reader/components/annotator/Annotator.tsx
+++ b/apps/readest-app/src/app/reader/components/annotator/Annotator.tsx
@@ -23,6 +23,7 @@ import { useFoliateEvents } from '../../hooks/useFoliateEvents';
 import { useNotesSync } from '../../hooks/useNotesSync';
 import { getPopupPosition, getPosition, Position, TextSelection } from '@/utils/sel';
 import { eventDispatcher } from '@/utils/event';
+import { getBookLangCode } from '@/utils/book';
 import AnnotationPopup from './AnnotationPopup';
 import WiktionaryPopup from './WiktionaryPopup';
 import WikipediaPopup from './WikipediaPopup';
@@ -339,7 +340,9 @@ const Annotator: React.FC<{ bookKey: string }> = ({ bookKey }) => {
     if (!selection || !selection.text) return;
     setShowAnnotPopup(false);
 
-    await view!.initTTS();
+    const lang = getBookLangCode(bookData.bookDoc!.metadata.language);
+    const granularity = ['zh', 'ja', 'ko'].includes(lang) ? 'sentence' : 'word';
+    await view!.initTTS(granularity);
     const ssml = view!.tts.from(selection.range)!;
     eventDispatcher.dispatch('speak', { bookKey, ssml });
   };
diff --git a/apps/readest-app/src/types/view.ts b/apps/readest-app/src/types/view.ts
index 135b2698..303f5188 100644
--- a/apps/readest-app/src/types/view.ts
+++ b/apps/readest-app/src/types/view.ts
@@ -2,6 +2,8 @@ import { BookDoc } from '@/libs/document';
 import { BookNote, BookSearchConfig, BookSearchResult } from '@/types/book';
 import { TTS } from 'foliate-js/tts.js';
 
+type TTSGranularity = 'sentence' | 'word';
+
 export interface FoliateView extends HTMLElement {
   open: (book: BookDoc) => Promise<void>;
   close: () => void;
@@ -18,7 +20,7 @@ export interface FoliateView extends HTMLElement {
   clearSearch: () => void;
   select: (target: string | number | { fraction: number }) => void;
   deselect: () => void;
-  initTTS: () => Promise<void>;
+  initTTS: (granularity?: TTSGranularity) => Promise<void>;
   tts: TTS;
   history: {
     canGoBack: boolean;
diff --git a/packages/foliate-js b/packages/foliate-js
index aa5f950b..238fbc21 160000
--- a/packages/foliate-js
+++ b/packages/foliate-js
@@ -1 +1 @@
-Subproject commit aa5f950b1f839f025a2f09432e5c3b62f8565234
+Subproject commit 238fbc216cff43ee41582b8549ba2bfdba3e2ce5