I think the _idea_ of a global audience was in mind, but when looking at who was a part of the discussions & how the language exists, it's pretty clear that a lot of cultures, nations, languages, and speech varieties weren't a part of the design process.
Maybe it could be said that Zamenhof's conceptions of "global audience" were those who were closest to hegemonic and/or supernational influence, which I think I'd agree with.
But I wouldn't call his design nor process particularly culturally inclusive.