diff --git a/module/common/lang/de.php b/module/common/lang/de.php
index c072ace827..fba68c28b3 100644
--- a/module/common/lang/de.php
+++ b/module/common/lang/de.php
@@ -672,6 +672,8 @@ $lang->error->reg             = "『%s』Format Error. It should be『%s』.";
 $lang->error->unique          = "『%s』『%s』existed. Please go to Admin->Data->Recycle to restore it, if you are sure it is deleted.";
 $lang->error->gt              = "『%s』should be >『%s』.";
 $lang->error->ge              = "『%s』should be >=『%s』.";
+$lang->error->lt              = "『%s』should be <『%s』。";
+$lang->error->le              = "『%s』should be <=『%s』。";
 $lang->error->notempty        = "『%s』should not be blank.";
 $lang->error->empty           = "『%s』should be null.";
 $lang->error->equal           = "『%s』has to be『%s』.";
diff --git a/module/common/lang/en.php b/module/common/lang/en.php
index 1aac0409b4..3133e923dc 100644
--- a/module/common/lang/en.php
+++ b/module/common/lang/en.php
@@ -302,6 +302,8 @@ $lang->error->reg             = "『%s』format error. It should be『%s』.";
 $lang->error->unique          = "『%s』『%s』exists. Go to Admin->Data->Recycle Bin to restore it, if you are sure it is deleted.";
 $lang->error->gt              = "『%s』should be >『%s』.";
 $lang->error->ge              = "『%s』should be >=『%s』.";
+$lang->error->lt              = "『%s』should be <『%s』。";
+$lang->error->le              = "『%s』should be <=『%s』。";
 $lang->error->notempty        = "『%s』should not be blank.";
 $lang->error->empty           = "『%s』should be null.";
 $lang->error->equal           = "『%s』has to be『%s』.";
diff --git a/module/common/lang/fr.php b/module/common/lang/fr.php
index 883f764bf2..d856773bcd 100644
--- a/module/common/lang/fr.php
+++ b/module/common/lang/fr.php
@@ -664,6 +664,8 @@ $lang->error->reg             = "『 %s 』erreur de format. Il devrait être『
 $lang->error->unique          = "『 %s 』『 %s 』existes. Allez à Admin->Recycle Bin pour le restaurer, si vous êtes sûr qu'il est supprimé.";
 $lang->error->gt              = "『 %s 』devrait être > 『 %s 』.";
 $lang->error->ge              = "『 %s 』devrait être >= 『 %s 』.";
+$lang->error->lt              = "『%s』should be <『%s』。";
+$lang->error->le              = "『%s』should be <=『%s』。";
 $lang->error->notempty        = "『 %s 』ne devrait pas être à blanc.";
 $lang->error->empty           = "『 %s 』devrait être nul.";
 $lang->error->equal           = "『 %s 』doit être 『 %s 』.";
diff --git a/module/common/lang/vi.php b/module/common/lang/vi.php
index acab25b119..7a25caa777 100644
--- a/module/common/lang/vi.php
+++ b/module/common/lang/vi.php
@@ -670,6 +670,8 @@ $lang->error->reg             = "『%s』format error. It should be『%s』.";
 $lang->error->unique          = "『%s』『%s』exists. Go to Admin->Data->Recycle Bin to restore it, if you are sure it is deleted.";
 $lang->error->gt              = "『%s』should be >『%s』.";
 $lang->error->ge              = "『%s』should be >=『%s』.";
+$lang->error->lt              = "『%s』should be <『%s』。";
+$lang->error->le              = "『%s』should be <=『%s』。";
 $lang->error->notempty        = "『%s』should not be blank.";
 $lang->error->empty           = "『%s』should be null.";
 $lang->error->equal           = "『%s』has to be『%s』.";
diff --git a/module/common/lang/zh-cn.php b/module/common/lang/zh-cn.php
index ad5b452a85..1d9e758089 100644
--- a/module/common/lang/zh-cn.php
+++ b/module/common/lang/zh-cn.php
@@ -302,6 +302,8 @@ $lang->error->reg             = "『%s』不符合格式，应当为:『%s』。
 $lang->error->unique          = "『%s』已经有『%s』这条记录了。如果您确定该记录已删除，请到后台-数据-回收站还原。";
 $lang->error->gt              = "『%s』应当大于『%s』。";
 $lang->error->ge              = "『%s』应当不小于『%s』。";
+$lang->error->lt              = "『%s』应当小于『%s』。";
+$lang->error->le              = "『%s』应当不大于『%s』。";
 $lang->error->notempty        = "『%s』不能为空。";
 $lang->error->empty           = "『%s』必须为空。";
 $lang->error->equal           = "『%s』必须为『%s』。";
diff --git a/module/common/lang/zh-tw.php b/module/common/lang/zh-tw.php
index f314c4182e..3f755c46a5 100644
--- a/module/common/lang/zh-tw.php
+++ b/module/common/lang/zh-tw.php
@@ -302,6 +302,8 @@ $lang->error->reg             = "『%s』不符合格式，應當為:『%s』。
 $lang->error->unique          = "『%s』已經有『%s』這條記錄了。如果您確定該記錄已刪除，請到後台-數據-資源回收筒還原。";
 $lang->error->gt              = "『%s』應當大於『%s』。";
 $lang->error->ge              = "『%s』應當不小於『%s』。";
+$lang->error->lt              = "『%s』應當小於『%s』。";
+$lang->error->le              = "『%s』應當不大於『%s』。";
 $lang->error->notempty        = "『%s』不能為空。";
 $lang->error->empty           = "『%s』必須為空。";
 $lang->error->equal           = "『%s』必須為『%s』。";