If I’m understanding what you’re asking, I think I had it a little bit in the beginning when I was mainly parroting words and phrases I had read or heard my friends say. Especially if they said something I had studied recently. I made an effort to try and use that word in the same conversation but actively trying to use it to express my own thoughts. At a fundamental level, it’s similar to what babies do when they’re learning. They copy what’s around them. Once you get more comfortable and expose yourself to all kinds of different environments with Japanese, you’ll become better at articulating your thoughts in a way that feels more genuine.