How to "localize" (translate) your program

[boriel]

Oh, that is great and I can imagine some uses for it, apart from Languages.
So this is C Plusplus syntax...

I think, I will try to use it without splitting into multiple sources:

Right!
But if you plan to give the lang source to other people to translate to their native language, I think it would be better to give them only a separated translation include file (e.g. because you don't want to give them the complete source).