"Dispute and Language Expertise" is a comprehensive study that addresses communication issues in intercultural marriages, particularly between Japanese women and their American husbands who communicate in Japanese. The book analyzes specific conversational sequences where disputes arise and highlights how the linguistic identities of the participants, such as the categories of native speaker and non-native speaker, as well as expert and novice, influence communication. The study reveals that conflicts in intercultural marriages are often attributable to the language proficiency of the partners rather than solely to language mastery or cultural differences. These findings provide valuable insights into the dynamics of language and identity in intercultural relationships and contribute to a better understanding of the challenges that arise from communication in different languages.