Fix string issue

modules/Canttalk/index.js

@@ -30,7 +30,7 @@ module.exports = async (bot, api) => {
                 api.respond(message, printf(api.strings.USER_VOICE_CHANGED, userVoice, api.ttsEngines[userEngine].longName));
             } else {
                 userVoice = api.ttsEngines[userEngine].getDefaultVoice();
-                api.respond(message, printf(api.strings.INVALID_VOICE, api.announcementVoice, api.announcementEngine.longName));
+                api.respond(message, printf(api.strings.INVALID_VOICE, api.announcementVoice, api.ttsEngines[userEngine].longName));
             }
             await api.db.run('update TTSPreferences set engine=?, voice=? where user_id=?', userEngine, userVoice, message.author.id);
         } else {