UPDATE: Square Enix has clarified that there is no dual option mode. Instead the voice language will adjust based on download region. Bummer! Hopefully someone can mod it.
You asked for it and we got it. Final Fantasy X/X-2 HD is coming on Steam this Thursday.
The PC version will obviously include both games plus a few nice PC extras such as 4K support and the choice to play the game with Japanese audio (a first for western regions). Not clue about 60 FPS support but one can hope!
This means the only Final Fantasy games not available on PC are 1, 2, and 12. Keep it up, Square.