diff --git a/module/doc/lang/de.php b/module/doc/lang/de.php
index d71f28d445..3dcb5ac510 100644
--- a/module/doc/lang/de.php
+++ b/module/doc/lang/de.php
@@ -256,6 +256,7 @@ $lang->doc->searchCondition = 'Search Condition';
 $lang->doc->list            = 'List';
 $lang->doc->zentaoData      = 'Zentao Data';
 $lang->doc->emptyError      = 'Not empty';
+$lang->doc->caselib         = 'Case Library';
 
 $lang->doc->zentaoList = array();
 $lang->doc->zentaoList['story']          = $lang->SRCommon;
diff --git a/module/doc/lang/en.php b/module/doc/lang/en.php
index 8fe69e2010..f0402911f2 100644
--- a/module/doc/lang/en.php
+++ b/module/doc/lang/en.php
@@ -256,6 +256,7 @@ $lang->doc->searchCondition = 'Search Condition';
 $lang->doc->list            = 'List';
 $lang->doc->zentaoData      = 'Zentao Data';
 $lang->doc->emptyError      = 'Not empty';
+$lang->doc->caselib         = 'Case Library';
 
 $lang->doc->zentaoList = array();
 $lang->doc->zentaoList['story']          = $lang->SRCommon;
diff --git a/module/doc/lang/fr.php b/module/doc/lang/fr.php
index 40f5e92e19..d50d61bdc1 100644
--- a/module/doc/lang/fr.php
+++ b/module/doc/lang/fr.php
@@ -256,6 +256,7 @@ $lang->doc->searchCondition = 'Search Condition';
 $lang->doc->list            = 'List';
 $lang->doc->zentaoData      = 'Zentao Data';
 $lang->doc->emptyError      = 'Not empty';
+$lang->doc->caselib         = 'Case Library';
 
 $lang->doc->zentaoList = array();
 $lang->doc->zentaoList['story']          = $lang->SRCommon;
diff --git a/module/doc/lang/zh-cn.php b/module/doc/lang/zh-cn.php
index 357de6bed1..c67a024098 100644
--- a/module/doc/lang/zh-cn.php
+++ b/module/doc/lang/zh-cn.php
@@ -256,6 +256,7 @@ $lang->doc->searchCondition = '搜索条件';
 $lang->doc->list            = '列表';
 $lang->doc->zentaoData      = '禅道数据';
 $lang->doc->emptyError      = '不能为空';
+$lang->doc->caselib         = '用例库';
 
 $lang->doc->zentaoList = array();
 $lang->doc->zentaoList['story']          = $lang->SRCommon;