fixed new lang selector

main.go

@@ -624,11 +624,11 @@ func getMatchChat(c *gin.Context) {
 		c.Status(http.StatusBadRequest)
 		return
 	}
-	var lang string
+	var lang language.Base
 	if len(tag) > 0 {
 		lang, _ = tag[0].Base()
 	} else {
-		lang = "en"
+		lang, _ = language.AmericanEnglish.Base()
 	}
 	log.Debugf("[GMC] Got header %s, selected %s from %v (w: %v)", c.GetHeader("Accept-Language"), lang, tag, weights)