Not exactly what you're asking for, but plenty of english speaking SEA players play FFXIV in japanese server.
The game has a universal language chat emote if you ends up partying with japanese.

Free trial here: http://freetrial.finalfantasyxiv.com/gb/
You can play until Level 35 for free now. Onwards, you have to pay.

Most sea players are in Tonberry server. Create character during off peak hour --- like 2-3 am weekdays, so that you can get your character in.