The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

Because I like PEPPERMINT
and it's fun to say "schnapps."
The Big Bang Theory Season 3, Episode 2

Bernadette, here's
your soy PEPPERMINT mocha.
The Big Bang Theory Season 7, Episode 10

I always thought Peppermint Patty
was a lesbian.
The Big Bang Theory Season 2, Episode 3

Why would you
buy PEPPERMINT schnapps?
The Big Bang Theory Season 3, Episode 2

Peppermint schnapps.
The Big Bang Theory Season 3, Episode 2