The document discusses language contact, which occurs when languages interact through written communication or direct social interaction between speakers. It provides examples of language contact through Latin and English, and Turkish and German. Language contact can result in borrowing of words, phrases, sounds, and grammatical structures from one language to another. The extent of borrowing depends on factors like the intensity of contact, prestige of languages, and relationship between speaker groups. Pidgins and creoles may emerge in situations requiring a common language for communication, like trade or plantation settings.