Apparently Phoenix Wright is out in Japan already, I saw someone post a screenshot downloading it and it had an English title so maybe it has English already. Probably not worth figuring out the currency and risking it not being translated I guess. Appears to be $30, but as far as I know they didn't give a hard date for the West yet.
The Switch version has English text. I'd be surprised if the Xbox version didn't either because that would require effort on Capcom's part.