The Tucano are a multilingual people because men must marry outside their language group; that is, no man may have a wife who speaks his language, for that kind of marriage relationship is not permitted and would be viewed as a kind of incest. Men choose the women they marry from various neighboring tribes who speak other languages.
Furthermore, on marriage, women move into the men's households or longhouses. Consequently, in any village several languages are used: the language of the men; the various languages spoken by women who originate from different neighboring tribes; and a widespread regional 'trade' language. Children are born into this multilingual environment: the child's father speaks one language (considered the Tucano language), the child's mother another, and other women with whom the child has daily contact perhaps still others. However, everyone in the community is inter¬ested in language learning so most people can speak most of the languages. Multilingualism is taken for granted, and moving from one language to another in the course of a single conversation is very common. In fact, multilingualism is so usual that the Tucano are hardly conscious that they do speak different languages as they shift easily from one to another. They cannot readily tell an outsider how many languages they speak, and must be suitably prompted to enumerate which languages they speak and to describe how well they speak each one.
