I'm not going to comment on what Nokia care said. I'll just state facts I know

The keyboard mat (the actual part that has the letters) can be changed. All what's needed is Nokia making one and the support for it on the hardware side.

The only thing I can offer as a software developer is the on-screen keyboard. I'm not interested in a hardware Arabic one but I'm interested in being able to type Arabic every now and then

As for the translation, I think I know someone who can do it. I'll try to poke him and see.

But that's not an official Nokia support