That's common with "heritage" speakers.

That's common with "heritage" speakers.
by starburns (2019-06-23 16:29:55)

In reply to: This is how it works in our house posted by Shifty

They not only can't read or write the language, but also often have trouble passing professional speaking tests if they haven't complemented the home speaking practice with formal study.

Replies:

It’s why my kids are still “Language acquisition.” - ewillND 2019-06-23 17:46:45
- If I've learned anything over my career - starburns 2019-06-23 19:22:07