I live in Finland, where in "product companies" developers don't always speak great English. Or they might not speak Finnish if they're immigrants. So the employer wants to pick and choose product managers that they think are "presentable" enough in terms of linguistic or social competence to put directly in front of a customer. They seem to value this high enough that they are willing to take the productivity hit from the indirection.
I don't speak Korean, but I'm a language nerd. Sometimes for fun I write Finnish in the Hangul alphabet in my journal (requires some approximation/adaptation).