I said the sentence
I'd been pronouncing the word wrong until a native speaker pointed out for me.
I doubt whether it's natural or not. So I posted it on a language exchange app. A native speaker pointed it out that this sentence should read as
I've been pronouncing the word wrong until a native speaker pointed it out to me.
Now I accept the revision of the "point out" part. But after giving some thought to the grammar rules, I think it's better to use the past perfect continuous tense at the beginning since the action of "pointing out" happens in the past. What do you think?