diff --git a/apps/readest-app/src/app/reader/components/settings/LayoutPanel.tsx b/apps/readest-app/src/app/reader/components/settings/LayoutPanel.tsx
index 05f087d4..9fa0fa50 100644
--- a/apps/readest-app/src/app/reader/components/settings/LayoutPanel.tsx
+++ b/apps/readest-app/src/app/reader/components/settings/LayoutPanel.tsx
@@ -7,9 +7,11 @@ import { useSettingsStore } from '@/store/settingsStore';
 import { useReaderStore } from '@/store/readerStore';
 import { useBookDataStore } from '@/store/bookDataStore';
 import { useTranslation } from '@/hooks/useTranslation';
+import { isCJKEnv } from '@/utils/misc';
 import { getStyles } from '@/utils/style';
 import { getMaxInlineSize } from '@/utils/config';
 import { getBookDirFromWritingMode, getBookLangCode } from '@/utils/book';
+import { MIGHT_BE_RTL_LANGS } from '@/services/constants';
 import NumberInput from './NumberInput';
 
 const LayoutPanel: React.FC<{ bookKey: string }> = ({ bookKey }) => {
@@ -244,8 +246,7 @@ const LayoutPanel: React.FC<{ bookKey: string }> = ({ bookKey }) => {
   }, [borderColor]);
 
   const langCode = getBookLangCode(bookData.bookDoc?.metadata?.language);
-  const mightBeRTLBook =
-    langCode === 'zh' || langCode === 'ja' || langCode === 'ko' || langCode === '';
+  const mightBeRTLBook = MIGHT_BE_RTL_LANGS.includes(langCode) || isCJKEnv();
 
   return (
     <div className='my-4 w-full space-y-6'>
diff --git a/apps/readest-app/src/services/constants.ts b/apps/readest-app/src/services/constants.ts
index 04d2c482..bdb2a376 100644
--- a/apps/readest-app/src/services/constants.ts
+++ b/apps/readest-app/src/services/constants.ts
@@ -458,3 +458,18 @@ export const CUSTOM_THEME_TEMPLATES = [
     },
   },
 ];
+
+export const MIGHT_BE_RTL_LANGS = [
+  'zh',
+  'ja',
+  'ko',
+  'ar',
+  'he',
+  'fa',
+  'ur',
+  'dv',
+  'ps',
+  'sd',
+  'yi',
+  '',
+];