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.

I think he might be LEARNING on his own.
The Big Bang Theory Season 10, Episode 9

Every boy in
the North knows it. We grow up LEARNING it.
Game of Thrones Season 3, Episode 7

She's LEARNING English from TV.
The Big Bang Theory Season 10, Episode 6

At what it's been LEARNING
about its subjects?
Westworld Season 2, Episode 9

What happened to LEARNING the unicycle?
The Big Bang Theory Season 10, Episode 22