Great idea but why not directly embed a *solid* language in your few transaction-bytes instead, like c++ for example.
Jokes aside, as already pointed out as long as which-ever-language is not part of the Bitcoin protocol, nothing will happen. 

And hopefully onchain program code from the few op-return commands will never be a thing with Bitcoin. No need for another turing-complete megachain. Just sidechain that shit or use a normal centralized server, which is probably the better solution in 99.9% of cases anyway.