Bienvenidos, ivanavi! Hablo un poco espanol, pero... I will be doing us both a big favor is I stuck to English!
I have been wondering about the availability of film and chemicals in Central America (for home development), which I suspect is less than Mexico (maybe Costa Rica or even Belize has some activity). I wonder if I were to have an extended stay in Guatemala, what, if anything would be available. My guess was (and is supported by your experience) that if anything is available, D-76 would be likely. Can you get HC110 in Mexico (I suspect based on toxicity and your comments, maybe not)?
I have only used film a couple of times there (Guatemala, as well as Mexico recently), and just brought it back to process. I claim (without proof) that I am the first person to shoot
ADOX CHS 100 II in Guatemala, and I would not be really surprised if that were the case! Reasonably likely it is not the case, but I cannot find any other photos on Flickr in Guatemala shot on CHS 100 II (or CHS 100). I do know one professional photographer in Guatemala, and of course he switched to digital. I need to have a conversation with him next time I go down about what film photography activity, if any, is still occurring.