Default lang for SQL Dev calls

packages/app.sql

@@ -242,7 +242,12 @@ CREATE OR REPLACE PACKAGE BODY app AS
         RETURN out_lang;
     EXCEPTION
     WHEN NO_DATA_FOUND THEN
+        BEGIN
             RETURN REPLACE(UPPER(SUBSTR(OWA_UTIL.GET_CGI_ENV('HTTP_ACCEPT_LANGUAGE'), 1, 2)), 'CS', 'CZ');
+        EXCEPTION
+        WHEN OTHERS THEN
+            RETURN 'EN';
+        END;
     END;