I was talking about the specific rules that are in place for title capitalization. As you can see in my example the uppercase letters seem randomly placed for a title, but they are indeed correct. For German too there are issues where capitalization has a meaning on the word itself. That kind of things.

It looks like your library does not support it, which is understandable, it is a huge problem to tackle, but I just wanted to be sure.

> It does not support non-English title casing

Perhaps document that clearly—it's an important restriction that the library assumes English-language strings. ("no inferences on the language itself is made" isn't quite true since the language is inferred to be English, or to at least follow English-compatible rules for casing)

Nice work, but since it does not handle anything else than strings, maybe it should be named "stringcase" or something.