[DrPhil]

I think the purpose of multicultural isn't to have members from every single culture before considering yourself multicultural; or explicitly listing all cultures that you include or welcome. It is to be open to different cultures and to have a purpose that stresses such openness.

In that sense, biculturalism would be different than multiculturalism (despite being used interchangeably sometimes) because biculturalism implies specific cultures that are included. In contrast, multiculturalism often includes and even lists different cultures in an "including but not limited to..." fashion.