Fear of Not Speaking Spanish
I have never mongered in Latin America until last year. It has always been the fear of not speaking Spanish that had kept me away from Latin America. It was covid restrictions in other countries that made me reconsider. When I first went to GDL last year, I spoke almost no Spanish and it is not the huge barrier that you might think. With Google Translate on your cellphone, you can make yourself understand. It takes a little longer but people will be able to understand you and you will be able to understand people speaking Spanish. They have to speak a little slower and speak clearly into your cellphone but you will be able to understand what they say. Yes, it can be a little scary but take your time and try again to make yourself understood and it will eventually work out.
As to spending time with girls in her room when they don't speak any English, I never found it to be a big issue. Sex is a universal language and everyone can figure out what the other person wants with non-verbal gestures and a little Google Translate. You don't have to seek out women who speak English and you shouldn't because it limits the number of girls you will see. Good sex is good sex in any language. The girls know how to please guys and no words need to be spoken.
That being said, speaking some Spanish enhances the experience. If you can learn a little Spanish, you should do it.