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.

...in the POPULAR online game
"Words With Friends."
The Big Bang Theory Season 6, Episode 6

You met her at Pasadena's most POPULAR
Irish watering hole, Lucky Baldwin's...
The Big Bang Theory Season 4, Episode 6

And for those of you who were POPULAR
in high school, it's over. Sorry.
The Big Bang Theory Season 8, Episode 22

the most POPULAR guy in the station,
and I just wanted to lose sight of him.
Money Heist Season 1, Episode 4

you'll end up
the most POPULAR dead man in town.
Game of Thrones Season 3, Episode 7