TESTING WS SERVER CHANGES As admin, enable "Mobile services": Site administration ► Mobile app ► Mobile settings Install two additional language packs in your site via Site administration > Language > Language packs Set English as Default language in Site administration > Language > Language settings Create or use an existing user in the platform (no admin) setting his language to English via User preferences > Preferred language Create a Token in the mobile app service for the student user: Click on Site administration ► Plugins ► Web services ► Manage tokens In your browser, open the following url (use your user token and your site URL): http://localhost/m/stable_master/webservice/rest/server.php?moodlewsrestformat=json&wsfunction=core_webservice_get_site_info&wstoken=12a2a65aeea2a177055e233f9e303218 Check that in the JSON response you see a field “lang” set to “en” (English language) Now, change the Default language via Site administration > Language > Language packs to other language different than english Open again the URL and you will still see lang set to en (English language) because is the user language profile Now, change the user preferred language via User preferences > Preferred language to a different language than English and the Site language Open again the Url and check that this time lang is set to the language used in the User preferences Append the following to the URL &moodlewssettinglang=en, an open it again, you will see now that the language is set to English If you change the value of moodlewssettinglang to any installed language code and open the URL, the lang field must always set to that language TESTING WEB SERVICE As admin go to Site administration > Language > Language settings Change the following settings: autolang, lang, langmenu, langlist and locale Open in your browser the following URL (using the previous token and your site URL): http://localhost/m/stable_master/webservice/rest/server.php?moodlewsrestformat=json&wsfunction=tool_mobile_get_public_config&wstoken=12a2a65aeea2a177055e233f9e303218 Check that the returned values for the fields autolang, lang, langmenu, langlist and locale matches the one in the web interface (for checkboxes it will be a 1 when the checkbox is ticked)