Heteroglossia

Heteroglossia is like when you talk to different groups of people, you might talk differently depending on who you're talking to. For example, you might use simple words and sentences when talking to a little kid, but bigger words and longer sentences when talking to a grown-up. Heteroglossia means that you use different kinds of language (like different accents or slang words) depending on who you're talking to or what situation you're in. It's like using different voices for different characters when you're telling a story. When lots of different people talk in lots of different ways, it's called heteroglossia.