You can’t play Phantasy Star Online 2 on US servers because they don’t exist. But you could, in theory, play the Southeast Asian version, which is already fully translated and all, but that incarnation has a region block on it to keep you out. Or it did, anyway. The servers for Southeast Asian players appear to have had their region block disabled, allowing you to log in and play from anywhere in the world if so inclined.
Exactly why the block has been disabled is unknown, as it wasn’t specifically announced; most speculation centers around a problem with some local ISPs making even local logins impossible. There’s no promise that it’ll last, sadly, but for the moment you can log in and play the game in English without pretending you’re from another part of the globe altogether.