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.

...you can expect a very effusive FOOTNOTE
and perhaps a signed copy.
The Big Bang Theory Season 3, Episode 1

Does the saying
have a FOOTNOTE about
fucking lassos, then?
Westworld Season 2, Episode 5

Did you enjoy the FOOTNOTE where
I illustrate mirror symmetry by likening it...
The Big Bang Theory Season 2, Episode 6

a FOOTNOTE in my memoirs,
The Big Bang Theory Season 5, Episode 15