It feels like it is the jaw, throat , eyes, face, spine, ribs,etc
To talk with the left tongue seems to mean I have to use the whole left side in a different way to communicate effectively. Using the left side different feels to mean the right side has to give up it's position of advantage.
Just tried to smile on the left side of my face only with the right eye shut. I did not realize but I was smiling on the right side only for three times before I became aware of what I was doing.
The exact opposite of what I intended.