diff --git a/apps/readest-app/src/app/reader/components/sidebar/BookCard.tsx b/apps/readest-app/src/app/reader/components/sidebar/BookCard.tsx
index e86874ac..79aca486 100644
--- a/apps/readest-app/src/app/reader/components/sidebar/BookCard.tsx
+++ b/apps/readest-app/src/app/reader/components/sidebar/BookCard.tsx
@@ -1,7 +1,6 @@
 import React from 'react';
 import Image from 'next/image';
 import { MdInfoOutline } from 'react-icons/md';
-import { formatAuthors } from '@/utils/book';
 
 interface BookCardProps {
   cover: string;
@@ -24,7 +23,7 @@ const BookCard: React.FC<BookCardProps> = ({ cover, title, author }) => {
       />
       <div className='min-w-0 flex-1'>
         <h4 className='line-clamp-2 w-[90%] text-sm font-semibold'>{title}</h4>
-        <p className='text-neutral-content truncate text-xs'>{formatAuthors(author)}</p>
+        <p className='text-neutral-content truncate text-xs'>{author}</p>
       </div>
       <button
         className='btn btn-ghost hover:bg-base-300 h-6 min-h-6 w-6 rounded-full p-0 transition-colors'
diff --git a/apps/readest-app/src/services/appService.ts b/apps/readest-app/src/services/appService.ts
index b3e2cacc..df601c29 100644
--- a/apps/readest-app/src/services/appService.ts
+++ b/apps/readest-app/src/services/appService.ts
@@ -11,6 +11,8 @@ import {
   getConfigFilename,
   getLibraryFilename,
   INIT_BOOK_CONFIG,
+  formatTitle,
+  formatAuthors,
 } from '@/utils/book';
 import { RemoteFile } from '@/utils/file';
 import { partialMD5 } from '@/utils/md5';
@@ -130,8 +132,8 @@ export abstract class BaseAppService implements AppService {
       const book: Book = {
         hash,
         format,
-        title: loadedBook.metadata.title,
-        author: loadedBook.metadata.author,
+        title: formatTitle(loadedBook.metadata.title),
+        author: formatAuthors(loadedBook.metadata.author),
         lastUpdated: Date.now(),
       };
       if (!(await this.fs.exists(getDir(book), 'Books'))) {
diff --git a/apps/readest-app/src/utils/book.ts b/apps/readest-app/src/utils/book.ts
index 8f897fd6..db644c5e 100644
--- a/apps/readest-app/src/utils/book.ts
+++ b/apps/readest-app/src/utils/book.ts
@@ -37,11 +37,13 @@ interface Contributor {
   name: LanguageMap;
 }
 
+const userLang = navigator?.language || 'en';
+
 const formatLanguageMap = (x: string | LanguageMap): string => {
   if (!x) return '';
   if (typeof x === 'string') return x;
   const keys = Object.keys(x);
-  return x[keys[0]!]!;
+  return x[userLang] || x[keys[0]!]!;
 };
 
 const listFormat = new Intl.ListFormat('en', { style: 'long', type: 'conjunction' });
@@ -56,3 +58,7 @@ export const formatAuthors = (contributors: string | Contributor | [string | Con
     : typeof contributors === 'string'
       ? contributors
       : formatLanguageMap(contributors?.name);
+
+export const formatTitle = (title: string | LanguageMap) => {
+  return typeof title === 'string' ? title : formatLanguageMap(title);
+};