Steemit has a lot of Spanish-speaking users, but your right, most aren't Mexican. Venezuela is the most prominent Spanish-speaking country on the platform, which is probably because their currency is getting destroyed and having access to funds (not in the form of Bolívars) is one of the few ways that they can purchase things they need to survive.

It'd be great if we could get more Mexican users on the platform. To be able to spend your time somewhere online that pays you a little something for that time​ is far superior to the other social media platforms.