I use android 7. My system language is Turkish. When I try to login my nas device with admin account, it changes to capital letters and it becomes "ADMİN" and I can not login because it doesn't recognise the user name. Same thing happens also with public folder, it tries to see under "PUBLİC" folder. App says "Folder could not be found"

So as a coclussion app should be able to work in English independently from the system language.

You can try the scenario and you will see what I mean.