I tried to learn Spanish several times without success. Once I thought I had it so I'm in the jungle in back country Yucatan and I'm ordering breakfast. The waiter looked at me like I was speaking Martian.I remember going to Mexico back in the 80's and learned to count to 10 in Spanish. I remember trying to get a big wrench and thought I could ask in Spanish. When the kid came back he had a machete. Oops.
I remember not knowing as much Spanish as I thought I did.
After a while we realized, he spoke English and Mayan. He never learned Spanish either.