I would like to endorse the idea of tutoring; it can have the free benefit of having your pupil help you with pronunciation. I would like to expand on point 2.

I would like to endorse the idea of tutoring; it can have the free benefit of having your pupil help you with pronunciation. I would like to expand on point 2. If you make a point to introduce yourself all around and don't interact other than that, you're still in a social situation that benefits you, even if you're focused on playing the game. Further, over time, teams will have some churn, so you're setting yourself up to have medium term casual relationships with lots of people. Finally, there's often a bar outing after such games, allowing for further interaction. Tell your team that you're working on your english; they're committed to you via the team, and are likely to provide you with consistent and quality feedback.