diff --git a/module/doc/lang/en.php b/module/doc/lang/en.php
index 53015390d1..77641e9c78 100644
--- a/module/doc/lang/en.php
+++ b/module/doc/lang/en.php
@@ -55,7 +55,6 @@ $lang->doc->createLib      = 'Create library';
 $lang->doc->editLib        = 'Edit library';
 $lang->doc->deleteLib      = 'Delete library';
 $lang->doc->libName        = 'Library name';
-$lang->doc->deleteFile     = 'Delete file';
 
 $lang->doc->systemLibs['product'] = 'Product doc';
 $lang->doc->systemLibs['project'] = 'Project doc';
diff --git a/module/doc/lang/ja.php b/module/doc/lang/ja.php
index a6ca1b0efd..4bf324912d 100644
--- a/module/doc/lang/ja.php
+++ b/module/doc/lang/ja.php
@@ -55,7 +55,6 @@ $lang->doc->createLib      = '作成ライブラリ';
 $lang->doc->editLib        = '[編集]ライブラリ';
 $lang->doc->deleteLib      = '削除ライブラリ';
 $lang->doc->libName        = 'ライブラリ名';
-$lang->doc->deleteFile     = 'ファイルを削除';
 
 $lang->doc->systemLibs['product'] = '製品ドキュメント';
 $lang->doc->systemLibs['project'] = 'プロジェクトドキュメント';
diff --git a/module/doc/lang/ko.php b/module/doc/lang/ko.php
index 758fb48319..9c6f09c2db 100644
--- a/module/doc/lang/ko.php
+++ b/module/doc/lang/ko.php
@@ -55,7 +55,6 @@ $lang->doc->createLib      = '라이브러리 만들기';
 $lang->doc->editLib        = '수정 도서관';
 $lang->doc->deleteLib      = '도서관 삭제';
 $lang->doc->libName        = '도서관 이름';
-$lang->doc->deleteFile     = '삭제 파일';
 
 $lang->doc->systemLibs['product'] = '제품 박사님';
 $lang->doc->systemLibs['project'] = '프로젝트 의사';
diff --git a/module/doc/lang/zh-cn.php b/module/doc/lang/zh-cn.php
index c51492e162..38d1af3f6b 100644
--- a/module/doc/lang/zh-cn.php
+++ b/module/doc/lang/zh-cn.php
@@ -55,7 +55,6 @@ $lang->doc->createLib      = '创建文档库';
 $lang->doc->editLib        = '编辑文档库';
 $lang->doc->deleteLib      = '删除文档库';
 $lang->doc->libName        = '文档库名称';
-$lang->doc->deleteFile     = '刪除文件';
 
 $lang->doc->systemLibs['product'] = '产品文档库';
 $lang->doc->systemLibs['project'] = '项目文档库';
diff --git a/module/doc/lang/zh-tw.php b/module/doc/lang/zh-tw.php
index 098790f313..203e30fd39 100644
--- a/module/doc/lang/zh-tw.php
+++ b/module/doc/lang/zh-tw.php
@@ -55,7 +55,6 @@ $lang->doc->createLib      = '創建文檔庫';
 $lang->doc->editLib        = '編輯文檔庫';
 $lang->doc->deleteLib      = '刪除文檔庫';
 $lang->doc->libName        = '文檔庫名稱';
-$lang->doc->deleteFile     = '刪除檔案';
 
 $lang->doc->systemLibs['product'] = '產品文檔庫';
 $lang->doc->systemLibs['project'] = '項目文檔庫';
diff --git a/module/group/lang/resource.php b/module/group/lang/resource.php
index 14f5e764f3..914c394cbd 100644
--- a/module/group/lang/resource.php
+++ b/module/group/lang/resource.php
@@ -188,7 +188,6 @@ $lang->resource->doc->create    = 'create';
 $lang->resource->doc->view      = 'view';
 $lang->resource->doc->edit      = 'edit';
 $lang->resource->doc->delete    = 'delete';
-$lang->resource->doc->deleteFile= 'deleteFile';
 
 /* 组织视图。*/
 $lang->resource->company->index  = 'index';