Translation of mouthpiece in Spanish

My parents were Italian, but the first language I learned was Spanish, since we lived in southern Spain. Very close to Gibraltar. When I was older, like twelve I moved with them back to Lucca in Italy.
I would also need to know whether pricing can be different, because otherwise that amount would be too high. Some of the translations are not accurate at all and would also need corrections so that the dictionary displays only correct words.
My problem never was the writing part, but I did not have the courage to speak. When I did not get further, I had to use my hands and feet to communicate, which always seems a little stupid.