Test on any device of your choice.
Add a new master site and go to sign up.
Check the country is preselected.
Open the country selector and check is sorted in your language.
In the App and Desktop countries are ordered by "short name" isntead of "full name", instead in the Moodle web they ordered by "full name". (For example in the case of: $string['AE'] = 'United Arab Emirates')