The document discusses several topics related to language including:
1. Children learn language swiftly without much instruction and all languages have a sound system, vocabulary, and grammar.
2. Language varies based on social contexts as speakers use different styles and subdialects, and language naturally changes over time.
3. The second section discusses parts of speech and provides true/false statements about nouns, verbs, adjectives, adverbs, prepositions, pronouns, conjunctions, and interjections.