diff --git a/src/core/ChatProvider.js b/src/core/ChatProvider.js
index f24ce29..7bb5dd0 100644
--- a/src/core/ChatProvider.js
+++ b/src/core/ChatProvider.js
@@ -21,6 +21,7 @@ export class ChatProvider {
       this.history.push([]);
     }
     this.caseCheck = /^[A-Z !.]*$/;
+    this.cyrillic = new RegExp('[\u0436-\u043B]');
     this.filters = [
       {
         regexp: /ADMIN/gi,
@@ -145,6 +146,10 @@ export class ChatProvider {
       }
     }
 
+    if (message.match(this.cyrillic) && channelId === 0) {
+      return 'Please use int channel';
+    }
+
     if (this.mutedCountries.includes(country)) {
       return 'Your country is temporary muted from chat';
     }