if you learn only one Spanish sentence, then make it this:Think about it...deaf people who can communicate using English whether it is perfect or not have accomplished than most hearing people in the US have. Most hearing people in the US are fluent in only one language but Deaf ASL users are able to use two languages and if their English is not perfect, it is better than not being able to read and write at all!
I have a good friend who is Deaf and her English is not that great but she is fluent in ASL and Spanish and her Spanish writing skills are impeccible according to my hearing friends who are also fluent in Spanish. I cant even write one sentence in Spanish so I would say that she is more literate than I am. Cant judge people based on their English grammar.
I wouldnt reject anyone because they dont have perfect writing skills.
¿Dónde está el baño?