take language from system|

Signed-off-by: Jakub Delicat <jakub.delicat@pwr.edu.pl>

safety_user_plugin/qt_wrapper.py

@@ -25,19 +25,14 @@ class QtWrapper:
         self.widget = widget
         self.displayed_robots_id_list = []
         
-        # lang = rospy.get_param('lang')
-        lang = "pol"
+        lang = os.getenv("LANG")
 
-        if lang == "eng":
-            self.language = ET
-            self.log_info("Started english version of plugin NEW")
-        elif lang == "pol":
+        if lang[:2] == "pl":
             self.language = PT
             self.log_info("Polska wersja pluginu uruchomiona")
         else:
-            raise ValueError(
-                'language parameter has value different than "eng" or "pol"'
-            )
+            self.language = ET
+            self.log_info("Started english version of plugin NEW")
 
         self.clear_robot_info()