When the Dutch colonized/invaded Indonesia they started referring to these monkeys as 'orang belanda' or 'monyet belanda' (Dutchman/monkey). Because of our relative big noses. So I guess they were already onto something back then.

That monkey is also staple Polish meme, representing typical Polish boomer and his family, the spiecies is called "nosacz sundajski" in Polish, i can't guarantee your sanity after searching though since those memes range from pretty funny to absolutely disgusting.

is this actually real? none of these sound like dutch words

The OP did, in fact, stop thinking about it.

'They' refers to the Indonesians here I think.

Those are Indonesian words.

lmao