Change game's culture (language) during runtime (without restart)

In 4.7 in the c++ it is possible, for example:

FInternationalization::Get().SetCurrentCulture(TEXT("en"));
FInternationalization::Get().SetCurrentCulture(TEXT("pl"));

or something.

Of course I have some problem in cooked build, probably my cultures aren’t cooked or something, but this is another issue.