I can certainly give a few suggestions for languages:
- C++ - Hey you got Qt.
- Java Droid - Take out the 80+ % smartphone coverage with that in it’s native lang
- Obj C - take out the balance(nearly) of mobile phones and tablets. Don’t forget the OSX desktops
- .Net(C#) - VB can port from C# anyways. Get some native Win support with WPF/ASP
- JS(JavaScript) - Nodejs, well it’s just JS anyways with some modules
Not really sure about how TypeScript and stuff fare
You can always have some scripting languages too:
- Python - Well just cos we don’t want to leave them out. kidding
Finally:
- C - Enuff said I guess, could almost go to all them above languages from this(with some effort).