Yes. But marketing helps much more!
Why would Asian chose EPL over Liga? EPL targets Asian markets - that's the answer! They play at noon (12p.m - 5p.m) for the Asian countries to watch because it is at 7p.m then - in Japan, Korea, China, Vietnam, Thai... which is perfect!! Do you know in order to watch Barca/RM, we have to wake up at 3 - 5a.m in the morning? Do Liga has Asian markets in mind? I don't think so. What else? They sign Asian players (Park, Kagawa, Ryo...) so that Japanese and Korean - which are two richest demographic parts in Asia - pay attention to them.
It's all about marketing. It's not like because we understand English that we watch Holywood movies or EPL talk shows - TRANSLATION is all that needed. My friends here in Vietnam don't speak English, yet they are either MU, Arsenal, Liverpool or Chelsea's fans. I speak English yet I prefer La Liga.
I'm not saying language doesn't mean anything. It does. It affects the preference of North A and South A viewers, as much as demographic, historic and some other factors... Just saying marketing is much more important!