Throughout the day you use language differently. If you speak more than one language, you may switch between languages. Even if English is your 'only' language, you likely speak different dialects or styles of English.
For a day or half a day keep a record of when you switch languages/dialects/styles, who you were with and what you were talking about.
Share your record here.
Comment on the record. What do you think about how often you switch? Did you switch in the same situations or different situations? Did certain topics make you speak in a certain way?