Yeah this seems common. I had a friend who grew up with parents who alternated between English, Portuguese, Italian, and French, and he told me he wound up not being able to speak at all until he was over 2 years old. It didn’t affect him badly later on, and he always insisted it was worth it
The oldest one we’ve found is 30,000 years old. I’d be willing to bet they’ve actually been around almost as long as we’ve been using tools and enjoying sex