There's a software called vnpy on github that's in chinese.
We have a translated copy to english. The goal is to keep their MIT license but just for that code.
We're wondering: Should we make a subdirectory in our codebase of prototypes, put the MIT license there (so that it applies only to code in that folder). Or make a new repo with this translation?
So the main question is: can you somehow signal that a license applies only a subdirectory, and what are best practices?