Final answer:
Language belongs to the Pluralism model of diversity, where cultures retain unique identities within a society, akin to the 'salad bowl' metaphor.
Step-by-step explanation:
The question regarding which model of diversity language belongs to can be best understood within the context of intergroup relations and cultural studies. Language is a critical part of culture and identity, and it is maintained and celebrated in a society that follows the Pluralism model of diversity.
Pluralism is evidenced by the 'salad bowl' metaphor where different cultures are mixed together but retain their unique identities, contributing to the overall diversity of a society without being assimilated into a homogeneous culture. This contrasts with a monocultural or melting pot approach, where cultural differences are expected to converge into a single, dominant cultural norm.