Kid only speaks Spanish help

I don’t know if this is the right flair but I really need help.. I’m a swim coach and I’m in high school and there’s a young boy in my class (3-5 yrs) and he doesn’t speak any English.

I’m able to communicate through hand motions and saying “Bueno” “No bueno” and stuff like that, but it’s not gonna be sustainable in the long run. I don’t live in America so Spanish isn’t a second language for me or anyone I work with.

Are there any basic vocabulary words that I can use to get a message across? I don’t need a long sentences, just some basic stuff. Good job, fast, slow, stop, listen, watch/look at me, as some examples.

I know this is probably a useless request, but translation apps have led me wrong in the past, and I just want to see this boy succeed.

Thank you

TLDR: I need some basic Spanish vocabulary to talk to my student and don’t know where to go