For my Spanish speaking tenants, not only is their lease in Spanish, I send them tenant communications and such in both English and Spanish.

I currently reside in Taichung, Taiwan where I have been teaching English for a year.

I don't speak Spanish and she doesn't speak English.

I wouldn't worry too much about knowing the language because the property management company will be able to speak English and most of the time your bookings will be with international people. 

The family will change last names and the kids will probably go to English-language accredited schools over there.

Here's my why:My husband is a high school English teacher who loves teaching the lower level often underprivileged student. 

The English was ridiculously bad and the lease appeared to be from the UK.....in spite of that the two people that approached me said they almost fell for it. 

Belizes official language is English but you will not be able to communicate with them even though they and you understand each word your saying.  

However, it should not be unreasonable to expect you to write complete thoughts, if not sentences, and do some basic spell checking.I'm not saying you need to be an English professor.  

Andrew, in another life I was an English teacher.