It’s well-known that hospitals and healthcare systems must provide interpreting and translation services to patients free of charge to stay in compliance with the federal government, not to mention it's just the right thing to do.
You're vacationing with your family in a foreign country. You assume many people speak English but truth is, it's a little tough to get by.
One afternoon your child falls and injures themselves - they need medical attention. Wouldn't you want to be able to effectively communicate with the doctors? How much panic would you feel not being able to communicate?