Is the US not in the UN now or something? The whole UNUDHR was an Eleanor Roosevelt project. She literally drafted the documents! At least look it up before being rude. You need to get the knowledge before applying the sass.
Well this was really just a sub-argument about whether 'inalienable' is an Americanism, which it is. The real point about 'natural' rights, or whatever term you've switched to using, is that they're simply assertions. Not supported by anything else. Doesn't really matter who is asserting them. The argument takes the same form, and is equally bunk.
"Natural rights are those that are not dependent on the laws or customs of any particular culture or government, and so are universal, fundamental and inalienable..."