Warren_Paul
Banishment this world!
Yes, I'd have a problem with it.
If english isn't the language spoken in the character's culture then it's not what he'd speak unless he learnt it somehow. Of course, you'd still write his dialogue in english, because otherwise the reader wouldn't understand what he is saying. But the other characters around him won't be able to, unless of course they know his language and their own, but then it's irrelevant what language he speaks.
I'd suggest making it that not everyone can understand him. Also, when he features in a scene that is from another character's PoV, you could make his dialogue rough, like how he would actually sound to other people, because the PoV character would have trouble understanding him.
If english isn't the language spoken in the character's culture then it's not what he'd speak unless he learnt it somehow. Of course, you'd still write his dialogue in english, because otherwise the reader wouldn't understand what he is saying. But the other characters around him won't be able to, unless of course they know his language and their own, but then it's irrelevant what language he speaks.
I'd suggest making it that not everyone can understand him. Also, when he features in a scene that is from another character's PoV, you could make his dialogue rough, like how he would actually sound to other people, because the PoV character would have trouble understanding him.