diff --git a/plugin/src/main/java/team/kitemc/verifymc/command/VmcCommandExecutor.java b/plugin/src/main/java/team/kitemc/verifymc/command/VmcCommandExecutor.java
index 218d1c77..250d1ccd 100644
--- a/plugin/src/main/java/team/kitemc/verifymc/command/VmcCommandExecutor.java
+++ b/plugin/src/main/java/team/kitemc/verifymc/command/VmcCommandExecutor.java
@@ -120,7 +120,7 @@ private void handleApprove(CommandSender sender, String[] args) {
                 String email = (String) user.get("email");
                 if (email != null && !email.isEmpty()) {
                     ctx.getMailService().sendReviewResult(email, storedTarget, true,
-                            "", ctx.getConfigManager().getLanguage());
+                            "", resolveUserLanguage(user));
                 }
             }
 
@@ -151,7 +151,7 @@ private void handleReject(CommandSender sender, String[] args) {
                 String email = (String) user.get("email");
                 if (email != null && !email.isEmpty()) {
                     ctx.getMailService().sendReviewResult(email, storedTarget, false,
-                            reason, ctx.getConfigManager().getLanguage());
+                            reason, resolveUserLanguage(user));
                 }
             }
 
@@ -182,6 +182,14 @@ private void handleDelete(CommandSender sender, String[] args) {
         }
     }
 
+    private String resolveUserLanguage(java.util.Map<String, Object> user) {
+        String lang = user.get("language") == null ? null : String.valueOf(user.get("language")).trim();
+        if (lang == null || lang.isEmpty()) {
+            lang = ctx.getConfigManager().getLanguage();
+        }
+        return lang;
+    }
+
     private void handleBan(CommandSender sender, String[] args) {
         if (!sender.hasPermission("verifymc.admin")) {
             sender.sendMessage("§6[VerifyMC] §cNo permission.");
diff --git a/plugin/src/main/java/team/kitemc/verifymc/db/FileUserDao.java b/plugin/src/main/java/team/kitemc/verifymc/db/FileUserDao.java
index 8a2b1173..87ea2b35 100644
--- a/plugin/src/main/java/team/kitemc/verifymc/db/FileUserDao.java
+++ b/plugin/src/main/java/team/kitemc/verifymc/db/FileUserDao.java
@@ -384,6 +384,23 @@ public boolean updateUserEmail(String username, String email) {
         return true;
     }
 
+    @Override
+    public boolean setUserLanguage(String username, String language) {
+        debugLog("setUserLanguage called: username=" + username + ", language=" + language);
+        String key = keyForUsername(username);
+        Map<String, Object> user = users.get(key);
+
+        if (user == null) {
+            debugLog("User not found: " + username);
+            return false;
+        }
+
+        user.put("language", language);
+        saveLater();
+        debugLog("User language updated: " + user.get("username"));
+        return true;
+    }
+
     @Override
     public Map<String, Object> getUserByUsername(String username) {
         debugLog("Getting user by username: " + username);
diff --git a/plugin/src/main/java/team/kitemc/verifymc/db/MysqlUserDao.java b/plugin/src/main/java/team/kitemc/verifymc/db/MysqlUserDao.java
index ba786b7e..cb0a4618 100644
--- a/plugin/src/main/java/team/kitemc/verifymc/db/MysqlUserDao.java
+++ b/plugin/src/main/java/team/kitemc/verifymc/db/MysqlUserDao.java
@@ -78,6 +78,7 @@ private void initDatabase() throws SQLException {
                     "password VARCHAR(255)," +
                     "regTime BIGINT," +
                     "discord_id VARCHAR(64)," +
+                    "language VARCHAR(8) NULL," +
                     "questionnaire_score INT NULL," +
                     "questionnaire_passed BOOLEAN NULL," +
                     "questionnaire_review_summary TEXT NULL," +
@@ -103,6 +104,12 @@ private void initDatabase() throws SQLException {
                 stmt.executeUpdate("ALTER TABLE users ADD COLUMN discord_id VARCHAR(64)");
             }
 
+            try {
+                stmt.executeQuery("SELECT language FROM users LIMIT 1");
+            } catch (SQLException e) {
+                stmt.executeUpdate("ALTER TABLE users ADD COLUMN language VARCHAR(8) NULL");
+            }
+
             try {
                 stmt.executeQuery("SELECT questionnaire_score FROM users LIMIT 1");
             } catch (SQLException e) {
@@ -278,6 +285,21 @@ public boolean updateUserEmail(String username, String email) {
         }
     }
 
+    @Override
+    public boolean setUserLanguage(String username, String language) {
+        String sql = "UPDATE users SET language=? WHERE username=?";
+        try (PreparedStatement ps = getConnection().prepareStatement(sql)) {
+            ps.setString(1, language);
+            ps.setString(2, username);
+            int rows = ps.executeUpdate();
+            debugLog("User language updated: " + username);
+            return rows > 0;
+        } catch (SQLException e) {
+            debugLog("Error updating user language: " + e.getMessage());
+            return false;
+        }
+    }
+
     @Override
     public List<Map<String, Object>> getAllUsers() {
         List<Map<String, Object>> result = new ArrayList<>();
@@ -314,6 +336,7 @@ private Map<String, Object> mapUserFromResultSet(ResultSet rs) throws SQLExcepti
         user.put("password", rs.getString("password"));
         user.put("regTime", rs.getLong("regTime"));
         user.put("discordId", rs.getString("discord_id"));
+        user.put("language", rs.getString("language"));
         user.put("questionnaireScore", rs.getObject("questionnaire_score"));
         user.put("questionnairePassed", rs.getObject("questionnaire_passed"));
         user.put("questionnaireReviewSummary", rs.getString("questionnaire_review_summary"));
diff --git a/plugin/src/main/java/team/kitemc/verifymc/db/UserDao.java b/plugin/src/main/java/team/kitemc/verifymc/db/UserDao.java
index 8fa2d866..1abd0278 100644
--- a/plugin/src/main/java/team/kitemc/verifymc/db/UserDao.java
+++ b/plugin/src/main/java/team/kitemc/verifymc/db/UserDao.java
@@ -26,6 +26,12 @@ boolean registerUser(String username, String email, String status, String passwo
 
     boolean updateUserEmail(String username, String email);
 
+    /**
+     * Persists the interface language the user registered with,
+     * so later emails (e.g. review notifications) can be localized per user.
+     */
+    boolean setUserLanguage(String username, String language);
+
     List<Map<String, Object>> getAllUsers();
 
     List<Map<String, Object>> getUsersWithPagination(int page, int pageSize);
diff --git a/plugin/src/main/java/team/kitemc/verifymc/mail/MailService.java b/plugin/src/main/java/team/kitemc/verifymc/mail/MailService.java
index 3d37045e..3c7693dd 100644
--- a/plugin/src/main/java/team/kitemc/verifymc/mail/MailService.java
+++ b/plugin/src/main/java/team/kitemc/verifymc/mail/MailService.java
@@ -82,10 +82,12 @@ public boolean sendCode(String to, String subject, String code, String language)
             File emailDir = new File(plugin.getDataFolder(), "email");
             File templateFile = new File(emailDir, "verify_code_" + lang + ".html");
             String content;
+            String serverName = plugin.getConfig().getString("web_server_prefix", "VerifyMC");
             if (templateFile.exists()) {
                 debugLog("Using custom template: " + templateFile.getAbsolutePath());
                 content = new String(Files.readAllBytes(templateFile.toPath()), StandardCharsets.UTF_8);
-                content = content.replace("{code}", escapeHtml(code));
+                content = content.replace("{code}", escapeHtml(code))
+                                 .replace("{server_name}", escapeHtml(serverName));
             } else {
                 debugLog("Using default template");
                 content = getDefaultVerifyCodeTemplate(lang, escapeHtml(code));
@@ -225,9 +227,10 @@ public boolean sendReviewResultNotification(String email, String username, boole
         try {
             String lang = (language != null && !language.isEmpty()) ? language : plugin.getConfig().getString("language", "zh");
             String templateName = approved ? "review_approved_" + lang + ".html" : "review_rejected_" + lang + ".html";
-            String subject = approved ? 
-                ("zh".equals(lang) ? "[VerifyMC] 您的白名单申请已通过" : "[VerifyMC] Your whitelist application has been approved") :
-                ("zh".equals(lang) ? "[VerifyMC] 您的白名单申请被拒绝" : "[VerifyMC] Your whitelist application has been rejected");
+            String serverPrefix = plugin.getConfig().getString("web_server_prefix", "VerifyMC");
+            String subject = approved ?
+                ("zh".equals(lang) ? serverPrefix + " 白名单申请已通过" : serverPrefix + " Whitelist Application Approved") :
+                ("zh".equals(lang) ? serverPrefix + " 白名单申请未通过" : serverPrefix + " Whitelist Application Rejected");
             
             File emailDir = new File(plugin.getDataFolder(), "email");
             File templateFile = new File(emailDir, templateName);
diff --git a/plugin/src/main/java/team/kitemc/verifymc/web/RegistrationProcessingHandler.java b/plugin/src/main/java/team/kitemc/verifymc/web/RegistrationProcessingHandler.java
index 05cdf6af..ff1a4d2d 100644
--- a/plugin/src/main/java/team/kitemc/verifymc/web/RegistrationProcessingHandler.java
+++ b/plugin/src/main/java/team/kitemc/verifymc/web/RegistrationProcessingHandler.java
@@ -294,6 +294,9 @@ private JSONObject executeRegistration(RegistrationRequest request, Questionnair
             ok = userDao.registerUser(request.normalizedUsername(), request.email(), status,
                     questionnaireScore, questionnairePassedValue, questionnaireReviewSummary, questionnaireScoredAt);
         }
+        if (ok && request.language() != null && !request.language().isEmpty()) {
+            userDao.setUserLanguage(request.normalizedUsername(), request.language());
+        }
 
         RegistrationApplicationService.RegistrationDecision decision =
                 registrationApplicationService.resolveDecision(ok, manualReviewRequired, questionnairePassed, registerAutoApprove, scoringServiceUnavailable);
diff --git a/plugin/src/main/java/team/kitemc/verifymc/web/handler/AdminUserHandler.java b/plugin/src/main/java/team/kitemc/verifymc/web/handler/AdminUserHandler.java
index 9ad0936d..f83e935b 100644
--- a/plugin/src/main/java/team/kitemc/verifymc/web/handler/AdminUserHandler.java
+++ b/plugin/src/main/java/team/kitemc/verifymc/web/handler/AdminUserHandler.java
@@ -316,10 +316,18 @@ private void sendReviewResult(String username, boolean approved, String reason)
         String email = (String) user.get("email");
         if (email != null && !email.isEmpty()) {
             ctx.getMailService().sendReviewResult(email, username, approved, reason,
-                    ctx.getConfigManager().getLanguage());
+                    resolveUserLanguage(user));
         }
     }
 
+    private String resolveUserLanguage(Map<String, Object> user) {
+        String lang = user.get("language") == null ? null : String.valueOf(user.get("language")).trim();
+        if (lang == null || lang.isEmpty()) {
+            lang = ctx.getConfigManager().getLanguage();
+        }
+        return lang;
+    }
+
     private void addAudit(String action, String operator, String target, String detail) {
         ctx.getAuditDao().addAudit(new AuditRecord(action, operator, target, detail, System.currentTimeMillis()));
     }