I'd suggest moving to a server on a JP data center. Elemental has a rather high English speaking population, with some servers (Tonberry, Kujata) at over 50%.
If you run the game using the English client, you'll still land in mostly English speaking groups, even if you set your DF languages to JEDF.

People here tend to play a bit more slowly. They still try to get stuff done, but not at the expense of safety. Chatting isn't even needed to find out whether your group is capable and willing to go fast, it mostly regulates itself after the first pull.