Multi-language pack for Verizon Galaxy S 5 ?

[KernelDuck]

I want to sell off my Verizon Galaxy S 5 to a customer who wants to have the Arabic language on the phone. I am aware that the bootloader is locked and that I can't install a different version of Android except for Verizon based ones. My mate has done something similar with his Sprint Galaxy S6. The bootloader is locked but he rooted it and installed a language pack to add further languages. Is there a way to root the Verizon S5 and install the languages somehow? Thank you.