... the grammar of English; the second is about related topics, including language variation (e.g., dialects), language learning, English spelling, and the history of the English language. Generally, ... studying language. You might want to know about language variation (“dialects” of various sorts), about how languages change over time, about the history of English, about the standardization of languages, ... about how languages are learned, about language disorders, about the relationships between language and culture or society, or about how computers are programmed to understand or produce language. ...