The document discusses theories of cross-cultural adjustment and acculturation. It describes Berry's Acculturation Model which outlines four acculturation strategies based on whether individuals retain their original culture or accept the host culture: integration, assimilation, separation, and marginalization. It also discusses Bourdieu's Social Field Theory and the concepts of habitus, field, and different types of capital. According to this theory, one's habitus must adapt when entering a new social field. Language institutions can help migrant students' habitus adjust to new fields, enabling them to acquire capital through integrative acculturation strategies and living in supportive host environments.