I don’t think Infinity uses some kind of special programming language or anything for trainers. I think the only thing stopping users from publishing trainers is the way trainers are added to Infinity. Devs seem to be able to push user-created cheats (dying light duplication cheat and STAR WARS Empire at War - Gold Pack Cheats)
Staff could tell you more, I am just making assumptions based on my limited programming knowledge and posts by the devs.