If you speak your native language, the best thing you can do for your child is to teach them the language. How? Speak to them.
I speak to my son in Yup’ik, but admit that I do not always speak to him in Yup’ik. I feel bad because he doesn’t understand many ‘easy’ words. I do not want my son to be a dumb Eskimo.
Please, teach your children their native language. Speak to them.