diff --git a/HMCL/src/main/java/org/jackhuang/hmcl/ui/account/CreateAccountPane.java b/HMCL/src/main/java/org/jackhuang/hmcl/ui/account/CreateAccountPane.java
index ff04f3bba..9b4bd3f09 100644
--- a/HMCL/src/main/java/org/jackhuang/hmcl/ui/account/CreateAccountPane.java
+++ b/HMCL/src/main/java/org/jackhuang/hmcl/ui/account/CreateAccountPane.java
@@ -267,7 +267,7 @@ public class CreateAccountPane extends JFXDialogLayout implements DialogAware {
                     }).executor(true);
         };
 
-        if (factory instanceof OfflineAccountFactory && username != null && !USERNAME_CHECKER_PATTERN.matcher(username).matches()) {
+        if (factory instanceof OfflineAccountFactory && username != null && (!USERNAME_CHECKER_PATTERN.matcher(username).matches() || username.length() > 16)) {
             JFXButton btnYes = new JFXButton(i18n("button.ok"));
             btnYes.getStyleClass().add("dialog-error");
             btnYes.setOnAction(e -> doCreate.run());
diff --git a/HMCL/src/main/resources/assets/lang/I18N.properties b/HMCL/src/main/resources/assets/lang/I18N.properties
index 0d99977a3..c65575b19 100644
--- a/HMCL/src/main/resources/assets/lang/I18N.properties
+++ b/HMCL/src/main/resources/assets/lang/I18N.properties
@@ -124,7 +124,7 @@ account.methods.microsoft.purchase=Buy Minecraft
 account.methods.microsoft.snapshot=You are using an unofficial build of HMCL. Please download the official build to log in.
 account.methods.microsoft.snapshot.website=Official Website
 account.methods.offline=Offline
-account.methods.offline.name.special_characters=Using only English letters, numbers, and underscores is recommended
+account.methods.offline.name.special_characters=Use only letters, numbers, and underscores (max 16 chars)
 account.methods.offline.name.invalid=It is recommended to use only English letters, numbers and underscores for the username, and the length should not exceed 16 characters.\n\
    \n\
    \  · Legitimate: HuangYu, huang_Yu, Huang_Yu_123;\n\
diff --git a/HMCL/src/main/resources/assets/lang/I18N_zh.properties b/HMCL/src/main/resources/assets/lang/I18N_zh.properties
index 7b2ea8de7..e035c7f63 100644
--- a/HMCL/src/main/resources/assets/lang/I18N_zh.properties
+++ b/HMCL/src/main/resources/assets/lang/I18N_zh.properties
@@ -131,7 +131,7 @@ account.methods.ban_query=查詢帳戶是否被封禁
 account.methods.microsoft.snapshot=你正在使用第三方提供的 HMCL。請下載官方版本進行登入。
 account.methods.microsoft.snapshot.website=官方網站
 account.methods.offline=離線模式
-account.methods.offline.name.special_characters=建議使用英文字母、數字以及底線命名
+account.methods.offline.name.special_characters=建議使用英文字母、數字以及底線命名，且長度不超過 16 個字元
 account.methods.offline.name.invalid=遊戲使用者名稱建議僅使用英文字母、數字及底線，且長度不超過 16 個字元。\n\
   \n\
   \  · 一些有效的使用者名稱：HuangYu、huang_Yu、Huang_Yu_123；\n\
diff --git a/HMCL/src/main/resources/assets/lang/I18N_zh_CN.properties b/HMCL/src/main/resources/assets/lang/I18N_zh_CN.properties
index e7059570c..8b0a454ab 100644
--- a/HMCL/src/main/resources/assets/lang/I18N_zh_CN.properties
+++ b/HMCL/src/main/resources/assets/lang/I18N_zh_CN.properties
@@ -139,7 +139,7 @@ account.methods.ban_query=检测账户是否被封禁
 account.methods.microsoft.snapshot=你正在使用第三方提供的 HMCL。请下载官方版本来登录微软账户。
 account.methods.microsoft.snapshot.website=官方网站
 account.methods.offline=离线模式
-account.methods.offline.name.special_characters=建议使用英文字符、数字以及下划线命名
+account.methods.offline.name.special_characters=建议使用英文字符、数字以及下划线命名，且长度不超过 16 个字符
 account.methods.offline.name.invalid=游戏用户名建议仅使用英文字母、数字及下划线，且长度不超过 16 个字符。\n\
   \n\
   \  · 一些合法用户名：HuangYu、huang_Yu、Huang_Yu_123；\n\