Since we have a registration for tutors, these things can vary a little bit but here the full list of options:

Python, HTML, CSS and Javascript Java, C++, Arduino, Algorithms, Web Engineering, Machine Learning, Cyber Security, Competitive Programming, Robotics, Game Development

You can also request something different or select 2-3 in the case that a tutor isn't allotted for one particular thing (Though that depends),

Again, this is more targeted toward usually teenagers and young learners, not necessarily for seasonal coders. But I figured it was worth posting on HN as there are some awesome people here.

And human languages? I see Brazil and Germany highlighted.