Enable the multilang filter for both content and headings Install both French and English language packs via 'language packs' admin setting. Set 'full site name' (fullname) admin setting to the following: <span class="multilang" lang="en">English site name</span><span class="multilang" lang="fr">French site name</span> Enable web services via Admin -> Plugins -> Web services Make sure REST is enabled Create a token for the mobile web service for the admin user and copy it somewhere Set your preferred language to 'English'. (User preferences -> preferred language) Now, run the following command: (replacing sitename and token) curl 'http://YOURSITE/webservice/rest/server.php?moodlewsrestformat=json' --data 'wsfunction=core_webservice_get_site_info&wstoken=TOKEN&moodlewssettingfilter=true' | python -m "json.tool" Verify you see the string 'English site name' coming back in the results. Set your preferred language to 'French'. (User preferences -> preferred language) Now, run the following command: (replacing sitename and token) curl 'http://YOURSITE/webservice/rest/server.php?moodlewsrestformat=json' --data 'wsfunction=core_webservice_get_site_info&wstoken=TOKEN&moodlewssettingfilter=true' | python -m "json.tool" Verify you see the string 'French site name' coming back in the results.