is it true or false

your ability to communicate effectively is known as what if your communication confidence?

Yes.

listening

Well you obviously were NOT communicating effectively. To communicate effectively you need to have a good understanding of the language you are using to communicate with.

If you had a good understanding of English you would know that "communicating effectively to" is not correct English. If you were communicating effectively using English you would have asked "How do you know you were effectively communicating with other staff" as your question.

You need to share a common language in order to communicate.