> Interoperability is fair use. What about improving the API? E.g. some languages may be mostly but not 100% compatible with existing languages and provide mor

> Interoperability is fair use. What about improving the API? E.g. some languages may be mostly but not 100% compatible with existing languages and provide more or less the same API but not be 100% the same - both the in the runtime library (API) and the language itself. For example Free Pascal is mostly compatible with Delphi but not the same and its runtime library is mostly the same as Delphi but also not the same.