Is the Natural language available in country languages other than English?
For example, German, Spanish etc?
No, it isn’t.
Natural on the mainframe allows you to do it yourself, though, by defining synonyms for Natural language elements.
But there’s so many arguments against it, like you’ll be generating programs that’ll only compile on a system knowing of these synonyms,
they are not portable (Natural on other platforms doesn’t allow for such tweaking),
etc., that one better stays away from the exercise 