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 don't know if it's a barrel LEAK...
Breaking Bad Season 3, Episode 13

{\i1}A massive LEAK of the secrets{\i0}
{\i1}that were kept in the Bank of Spain.{\i0}
Money Heist Season 3, Episode 6

"...no comments about the LEAK,
Money Heist Season 1, Episode 7

That's the size of the fucking LEAK.
Money Heist Season 3, Episode 5

I-I know it'’s not a baby, but it
does LEAK when you pick it up.
The Big Bang Theory Season 12, Episode 3