diff --git a/module/common/lang/en.php b/module/common/lang/en.php
index 7f11fddb8c..e832ef3108 100644
--- a/module/common/lang/en.php
+++ b/module/common/lang/en.php
@@ -526,7 +526,7 @@ $lang->error->URL             = "『%s』should be url.";
 $lang->error->date            = "『%s』should be valid date.";
 $lang->error->datetime        = "『%s』should be valid date.";
 $lang->error->code            = "『%s』should be letters or numbers.";
-$lang->error->account         = "『%s』should be >= 3 letters or numbers.";
+$lang->error->account         = "『%s』should be >= 3 letters, underline or numbers.";
 $lang->error->passwordsame    = "The two passwords should be the same.";
 $lang->error->passwordrule    = "Password should conform to rules. It should be >= 6 characters.";
 $lang->error->accessDenied    = 'Access is denied.';
diff --git a/module/common/lang/vi.php b/module/common/lang/vi.php
index 55ad7ef364..2d303c56db 100644
--- a/module/common/lang/vi.php
+++ b/module/common/lang/vi.php
@@ -526,7 +526,7 @@ $lang->error->URL             = "『%s』should be url.";
 $lang->error->date            = "『%s』should be valid date.";
 $lang->error->datetime        = "『%s』should be valid date.";
 $lang->error->code            = "『%s』nên là chữ hoặc số.";
-$lang->error->account         = "『%s』should be >= 3 letters or numbers.";
+$lang->error->account         = "『%s』should be >= 3 letters, underline or numbers.";
 $lang->error->passwordsame    = "The two passwords should be the same.";
 $lang->error->passwordrule    = "Password should conform to rules. It should be >= 6 characters.";
 $lang->error->accessDenied    = 'Truy cập bị từ chối.';
diff --git a/module/common/lang/zh-cn.php b/module/common/lang/zh-cn.php
index 6e1ab65d25..bc8917bc1e 100644
--- a/module/common/lang/zh-cn.php
+++ b/module/common/lang/zh-cn.php
@@ -526,7 +526,7 @@ $lang->error->URL             = "『%s』应当为合法的URL。";
 $lang->error->date            = "『%s』应当为合法的日期。";
 $lang->error->datetime        = "『%s』应当为合法的日期。";
 $lang->error->code            = "『%s』应当为字母或数字的组合。";
-$lang->error->account         = "『%s』只能是字母和数字的组合三位以上。";
+$lang->error->account         = "『%s』只能是字母、数字或下划线的组合三位以上。";
 $lang->error->passwordsame    = "两次密码应该相同。";
 $lang->error->passwordrule    = "密码应该符合规则，长度至少为六位。";
 $lang->error->accessDenied    = '您没有访问权限';
diff --git a/module/user/lang/en.php b/module/user/lang/en.php
index ea3231ac84..cf5f44cca7 100644
--- a/module/user/lang/en.php
+++ b/module/user/lang/en.php
@@ -172,7 +172,7 @@ $lang->user->placeholder->passwordStrength[1] = '>= 6 letters and numbers';
 $lang->user->placeholder->passwordStrength[2] = '>= 10 letters, numbers and special characters';
 
 $lang->user->error = new stdclass();
-$lang->user->error->account        = "ID %s，account must be >= 3 letters, underline, or numbers";
+$lang->user->error->account        = "ID %s，account must be >= 3 letters, underline or numbers";
 $lang->user->error->accountDupl    = "ID %s，account is used.";
 $lang->user->error->realname       = "ID %s，must be real name";
 $lang->user->error->password       = "ID %s，password must be >= 6 characters.";