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.

My ankles are so SWOLLEN.
Money Heist Season 3, Episode 2

Before you got all SWOLLEN up...
The Big Bang Theory Season 1, Episode 16

And I got itchy and SWOLLEN
The Big Bang Theory Season 7, Episode 23

Oh, it's not really SWOLLEN,
it's just--
Breaking Bad Season 4, Episode 3

Like these SWOLLEN sausages
could fit in gloves.
The Big Bang Theory Season 7, Episode 2