Language is different because people tend to be very forgiving of strangers with poor pronunciation and grammar. As long as you can make yourself understood, no

Language is different because people tend to be very forgiving of strangers with poor pronunciation and grammar. As long as you can make yourself understood, no one cares if you're not speaking like a local. If you really do want to speak like a local you'll need lessons from a professional voice coach - not just a language teacher - who will teach you how to move your mouth muscles to make the correct sounds. While some talented people can work this out for themselves, most people can't. Piano is the equivalent of having to work it out for yourself. Muscle memory of right-notes-in-the-right order is the start of musicality, not the end of it. You have to master that level to the point where it's unconscious before you control dynamics, tempo, and evenness - which are the performance details that make a performance successful and expressive, as opposed to sort-of-competent.