So western culture is broad but indigenous culture is very narrow and essentialistic? Funny how that works
Western culture is a very broad and vague term covering a number of cultures that are based on or profoundly influenced by the cultures of the Catholic Western part of Europe (which partly became Protestant later on) where Latin was the prestige language and all their diaspora cultures in settler colonial societies founded by Brits, Spaniards and Portuguese etc. It's broad because it's an "umbrella term" (even in Europe Polish and Portuguese cultures aren't exactly alike). Whereas Indigenous cultures are usually based on a particular indigenous group or a number of closely related groups. There are plenty of modern non-Western "umbrella cultures" like the Indonesian or the Swahili-based in East Africa and the pan-Arabic popular culture (with Egypt as its hub), but they aren't indigenous. Even if Latin American mainstream culture differs from the North American and Western European mainstream culture it is still a variation of Western culture.