I watched Galaxy Quest one time, and don´t liked.
It isn´t popular here in Brasil. As I said, some movies fits very well inside the culture of your native country, but not all around the world.
Well, you know something...Star Trek is written with the American audience in mind. There are hundreds of idiosyncratic things about it that are derived from American culture and directed at Americans.
And it has never really moved away from that in any significant way.
It's Paramount's great good luck that people around the world have responded to Trek the way they have. But it's not different from the long-time international popularity of the American Western genre.