diff --git a/JetKarmaBot/Commands/ChangeLocaleCommand.cs b/JetKarmaBot/Commands/ChangeLocaleCommand.cs
index 7d8c82c..f567e7f 100644
--- a/JetKarmaBot/Commands/ChangeLocaleCommand.cs
+++ b/JetKarmaBot/Commands/ChangeLocaleCommand.cs
@@ -48,7 +48,18 @@ namespace JetKarmaBot.Commands
                 if (Locale.ContainsLocale(cmd.Parameters[0]))
                     localeId = cmd.Parameters[0];
                 else
-                    localeId = Locale.FindByCommonName(cmd.Parameters[0]).Name;
+                    try
+                    {
+                        localeId = Locale.FindByCommonName(cmd.Parameters[0]).Name;
+                    }
+                    catch (LocalizationException e)
+                    {
+                        Client.SendTextMessageAsync(
+                        args.Message.Chat.Id,
+                        currentLocale["jetkarmabot.changelocale.toomany"] + "\n" + string.Join("\n", (e.Data["LocaleNames"] as Locale[]).Select(x => x.Name)),
+                        replyToMessageId: args.Message.MessageId);
+                        return true;
+                    }
                 db.Chats.Find(args.Message.Chat.Id).Locale = localeId;
                 log.Debug($"Changed language of chat {args.Message.Chat.Id} to {localeId}");
                 db.SaveChanges();
diff --git a/JetKarmaBot/Services/Localization.cs b/JetKarmaBot/Services/Localization.cs
index a3489cb..9843dfb 100644
--- a/JetKarmaBot/Services/Localization.cs
+++ b/JetKarmaBot/Services/Localization.cs
@@ -3,6 +3,7 @@ using System.Collections;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Runtime.Serialization;
 using Newtonsoft.Json.Linq;
 using NLog;
 using Perfusion;
@@ -67,6 +68,16 @@ namespace JetKarmaBot
                     return l;
                 }
             }
+            // Try to find as locale prefix
+            IEnumerable<Locale> matchinglocales = locales.Values.Where(x => x.Name.StartsWith(name + "-"));
+            if (matchinglocales.Count() > 1)
+            {
+                LocalizationException l = new LocalizationException("Too many locales");
+                l.Data["LocaleNames"] = matchinglocales.ToArray();
+                throw l;
+            }
+            else if (matchinglocales.Count() == 1)
+                return matchinglocales.First();
             log.Warn("Failed to find locale " + name);
             return null;
         }
@@ -148,4 +159,14 @@ namespace JetKarmaBot
             return ((IReadOnlyDictionary<string, string>)locale).GetEnumerator();
         }
     }
+    [System.Serializable]
+    public class LocalizationException : Exception
+    {
+        public LocalizationException() { }
+        public LocalizationException(string message) : base(message) { }
+        public LocalizationException(string message, Exception inner) : base(message, inner) { }
+        protected LocalizationException(
+            SerializationInfo info,
+            StreamingContext context) : base(info, context) { }
+    }
 }
\ No newline at end of file
diff --git a/JetKarmaBot/lang/be-BY.json b/JetKarmaBot/lang/be-BY.json
index 3d0518a..64896fb 100644
--- a/JetKarmaBot/lang/be-BY.json
+++ b/JetKarmaBot/lang/be-BY.json
@@ -26,6 +26,7 @@
         "jetkarmabot.changelocale.listalltext": "Я ведаю:",
         "jetkarmabot.changelocale.errorall": "Мне б хацелася гаварыць на ўсіх мовах у той жа самы час, але з-за абмежаванняў сусвету, мне гэта не дазваляецца.",
         "jetkarmabot.changelocale.beforenote": "Увага: ",
+        "jetkarmabot.changelocale.toomany": "Не ведаю, на якім дыялекце хочаш, каб я казаў.\nЯ ведаю гэтыя:",
         "jetkarmabot.changelocale.help": "Змяняе мову, на якім бот кажа ў гэтым чаце",
         "jetkarmabot.changelocale.localehelp": "Новая лакаль, альбо каманда list - спіс перакладаў. Калі пуста - паказваецца бягучая лакаль.",
         "jetkarmabot.help.help": "Паказвае інструкцыю да каманды, ці спіс каманд.",
diff --git a/JetKarmaBot/lang/en-US.json b/JetKarmaBot/lang/en-US.json
index 664a93c..be6d96f 100644
--- a/JetKarmaBot/lang/en-US.json
+++ b/JetKarmaBot/lang/en-US.json
@@ -25,6 +25,7 @@
     "jetkarmabot.changelocale.listalltext": "I know:",
     "jetkarmabot.changelocale.errorall": "I would like to speak all languages at once, but because of the rules of the universe, I am not allowed to do that.",
     "jetkarmabot.changelocale.beforenote": "Warning: ",
+    "jetkarmabot.changelocale.toomany": "I don't know what dialect you want me to speak in.\nI know these:",
     "jetkarmabot.changelocale.help": "Switches current chat locale to [locale]",
     "jetkarmabot.changelocale.localehelp": "The locale to switch to. Can be \"list\" to list all possible locales. Also can be empty to get current locale",
     "jetkarmabot.help.help": "Displays help text for all(one) command(s)",
diff --git a/JetKarmaBot/lang/ru-RU.json b/JetKarmaBot/lang/ru-RU.json
index 8cf41e0..e854a59 100644
--- a/JetKarmaBot/lang/ru-RU.json
+++ b/JetKarmaBot/lang/ru-RU.json
@@ -25,6 +25,7 @@
     "jetkarmabot.changelocale.listalltext": "Я знаю:",
     "jetkarmabot.changelocale.errorall": "Мне бы хотелось говорить на всех языках в то же самое время, но из-за ограничений вселенной, мне это не позволяется.",
     "jetkarmabot.changelocale.beforenote": "Внимание: ",
+    "jetkarmabot.changelocale.toomany": "Не знаю, на каком диалекте хочешь, чтобы я говорил.\nЯ знаю эти:",
     "jetkarmabot.changelocale.help": "Меняет язык, на котором бот говорит в этом чате",
     "jetkarmabot.changelocale.localehelp": "Новая локаль, либо команда list - список переводов. Если пусто - показывается текущая локаль.",
     "jetkarmabot.help.help": "Показывает инструкцию к команде, или список команд.",