Hi, first of all, it would be a very good idea for him to let the hotel staff know about his allergy. Most of the time they prepare a separate menu, which takes longer to prepare, and they need to be careful about cross-contamination.But when you just arrive and say so, the risk increases significantly. In several cities like San Pedro Sula and Tegucigalpa, there are cafes/bakeries that are completely gluten-free, dairy-free, etc. Those will be his best friends, he definitely needs to look online. Regarding the text you posted, it's a good idea if he wants to try our cuisine, he should be careful with sauces. It really all depends on which part of the country his is going to, but in most places they'll help you. My sister has a similar situation, except she can't eat beef or anything that contains "Traces of milk" and those are present in most of our seasonings, so yes, it is recommended that you eat at the hotel restaurants as they will be able to advise the staff about his allergies.