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.

An ISOLATED episode of
transient global amnesia.
Breaking Bad Season 2, Episode 3

I believe I've ISOLATED the algorithm
for making friends.
The Big Bang Theory Season 2, Episode 13

You’ll be safer here, more ISOLATED,
Money Heist Season 1, Episode 7