Raising a bilingual child without knowing English?

I had an argument with my friend because they don’t speak English but still want to raise their child using the bilingual method (where one parent speaks only English and the other speaks only the native language). Honestly, I wouldn’t have a problem with it if at least one of them were fluent in English or if they had a native speaker in the household. But my friend insists that they just need to learn basic English to talk to their child since the kid is still very young.

I completely disagree. If they’re not fluent, there will be so many situations where they say things incorrectly or struggle to express themselves. I mean, speaking English with a child isn’t just about saying 'Good morning, sweetheart,' 'Let’s eat,' or 'Goodnight.' It’s about being able to communicate naturally in all kinds of situations.

Has anyone actually succeeded in raising a bilingual child this way, where neither parent speaks English fluently?