Hello! Yes I would love for Non-Filipinos to play this and I encourage it. You don't really have to worry about the Setting and History since this is a Fantasy setting first and foremost! As long as you're having fun with the combat and potentially engaging in melodrama, and thriving in the Southeast Asian aesthetic, you're running it right.
Unfortunately it isn't setting agnostic but it is very easy to refluff, and making your own settlements and places is encouraged. Thank you so much!