diff --git a/src/Trafiklab/Common/Model/Contract/TimeTableRequest.php b/src/Trafiklab/Common/Model/Contract/TimeTableRequest.php
index fb2f20d..5e31d00 100644
--- a/src/Trafiklab/Common/Model/Contract/TimeTableRequest.php
+++ b/src/Trafiklab/Common/Model/Contract/TimeTableRequest.php
@@ -47,4 +47,8 @@ public function setTimeTableType(int $timeTableType): void;
     public function getDateTime(): DateTime;
 
     public function setDateTime(?DateTime $timeTableType): void;
+
+    public function getLanguage(): string;
+
+    public function setLanguage(string $lang): void;
 }