So they don't understand you. Because they lack your background. Because you lack theirs. Well, that's not going to change.

There's no silver bullet when it comes to communication. Listen more. Ask for feedback. Purge your explanations of technical jargon. When they state a concern, try paraphrasing it yourself and ask them whether you've understood them correctly.

If the people on your team can't communicate, then I suppose you could try bringing in somebody new – someone who CAN act as a liaison and explain everybody to everybody else. But that sounds arduous and dysfunctional. A team of 4 or 5 people ought to be able to talk to one another effectively. Maybe you guys should disband.