The local church can, after establishing the needs, decide on a plan for assisting new immigrants, holding classes for teaching English , providing day care for working mothers, having a youth sports night in the church or trying to help people get the legal, domestic or transportation counsel they need. There are many different models or forms a successful cross-cultural ministry may take. Some groups will move toward Anglo-American forms, but none will go all the way. This bothers some churches. But it shouldn't.
Perfect amalgamation is neither possible nor desirable.
We believe that God has created diversity. But this question reveals a prideful heart. Organizational unity is not the same as spiritual unity. It seems to be a common human trait to expect everyone to be exactly as we are. Yet the goal is seeking and saving that which is lost.