1. The document discusses slang terms, their uses and differences across cultures. Slang is informal language that varies regionally and among subcultures. 2. "Tinglish" is discussed, which is Thai slang that directly changes Thai words to English, resulting in funny grammar. It arose from increased tourism. 3. The document also covers potential conflicts from slang, such as misunderstandings. It provides an example of omitted subjects in Japanese and how culture influences language.