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.

...inform the Lords of the Vale
about the CEREMONY?
Game of Thrones Season 4, Episode 5

That'd be a lovely reading
at our CEREMONY.
The Big Bang Theory Season 11, Episode 17

perhaps a CEREMONY in the throne room?
Game of Thrones Season 6, Episode 10

We're committed to each other. We're happy.
A CEREMONY isn't gonna change anything.
The Big Bang Theory Season 8, Episode 24