[Answer]-Redundant django code

Do you mean something like this?

def get_slug(self, name):   
    slug = self.kwargs[name]
    return get_object_or_404(Language, slug=slug)

Can use as language = self.get_slug('slug')

Bear in mind that if kwargs doesn’t contain name then it’ll throw an error. To prevent this you could do something like:

slug = self.kwargs.get(name, None)
if slug is not None:
    ...