6.72 inject .elf file

Hello,
im on 6.72 fw ps4 pro
and I can't seem to find any injector to inject elf files. I want to use it to use an ghosts off-host menu. is there any on this fw?

Also I downloaded the eu version of cod ghosts and for some reason it is in polish and I don't get it wy is there a way to change it ?