Sure. God is far more interested in our hearts than He is in our religious vocabularies. Besides, prayer is just talking with God, so we can tell Him what’s on our mind just like we would with our friends. No spiritual jargon is required. One more point. Jesus picked ordinary guys to be His disciples. For example, several were plain-spoken fishermen and another was a tax collector. Interestingly, religious sounding phrases must not have been very important to Jesus because none of them were priests. That’s one of the great things about Jesus. He enjoyed hanging out with normal talking people like us.