Hello J-Walk!
It depends on the devices and the manufacturers. Sometimes, if it is not possible initially, you can install a software update or a patch for other languages to become available.
I would invite you to contact the manufacturers directly to have more information about this matter. You can find their websites here:
http://www.fido.ca/web/content/phonewarranty/phone_userguidesI hope this helps! Let me know if you have any other questions