For each language if it is a normal programming language, do:
- try with basic variable, types
- try with basic grammar
- try with basic input/output
- try function, class (if it has)
- () work with multi source files
- try with string, split/replace/join/slice
- (optional) try regex usage.
Other test:
- work with C language
- package management
- build system if it has
- debug tools