I don't think you need to feel embarrassed about it. You are learning it. It should be admired.
Nobody has responsibilities about what you didn't learn or your father didn't teach you.
Learning is an action that nobody insists. Education is an virtue that someone withdraw other's talent. If your children want to learn your local language in the future, help them and withdraw their talents. There is no time to regret. There is no time to think about whose responsibilities.Take a benefit of time. right? :)