Fix getting locale in lower version client by delaying message sending

src/main/java/fr/xephi/authme/service/CommonService.java

@@ -6,6 +6,8 @@ import fr.xephi.authme.message.Messages;
 import fr.xephi.authme.permission.PermissionNode;
 import fr.xephi.authme.permission.PermissionsManager;
 import fr.xephi.authme.settings.Settings;
+import fr.xephi.authme.settings.properties.PluginSettings;
+import fr.xephi.authme.util.Utils;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
 
@@ -22,6 +24,9 @@ public class CommonService {
     @Inject
     private Messages messages;
 
+    @Inject
+    private BukkitService bukkitService;
+
     @Inject
     private PermissionsManager permissionsManager;
 
@@ -46,6 +51,11 @@ public class CommonService {
      * @param key the message key
      */
     public void send(CommandSender sender, MessageKey key) {
+        if (Utils.majorVersion < 12 && settings.getProperty(PluginSettings.I18N_MESSAGES)) {
+            bukkitService.runTaskLater(() -> messages.send(sender, key), 35L);
+            return;
+        }
+
         messages.send(sender, key);
     }
 
@@ -57,6 +67,11 @@ public class CommonService {
      * @param replacements the replacements to apply to the message
      */
     public void send(CommandSender sender, MessageKey key, String... replacements) {
+        if (Utils.majorVersion < 12 && settings.getProperty(PluginSettings.I18N_MESSAGES)) {
+            bukkitService.runTaskLater(() -> messages.send(sender, key, replacements), 35L);
+            return;
+        }
+
         messages.send(sender, key, replacements);
     }
 

src/main/java/fr/xephi/authme/util/message/I18NUtils.java

@@ -40,7 +40,8 @@ public class I18NUtils {
                 spigotGetLocaleMethod.setAccessible(true);
 
                 return ((String) spigotGetLocaleMethod.invoke(spigot)).toLowerCase();
-            } catch (Exception ignored) {
+            } catch (Exception e) {
+                e.printStackTrace();
                 return null;
             }
         }