I wouldn't say that "very few people know it", it's just that people don't think about it. Just tell them "pingouin, not manchot. Pingouin flies but not manchot

I wouldn't say that "very few people know it", it's just that people don't think about it. Just tell them "pingouin, not manchot. Pingouin flies but not manchot. Manchot is called penguin in english". Also, the confusion is greater from the fact that the Grand Pingouin (extinct in the XIX century) did not fly