Chance as you know has been talking to the rest of us in Mandarin for a while now. The fact that nobody in the family knows Mandarin but Chance doesn't  bother him in the least.  I do have to say though, that since Chance uses certain words all of the time, sometimes I can figure out what he may be saying.  I don't think I could engage in a conversation with a native Mandarin speaker, but if they said hello to me or said goodnight, I might get the gist of what they were saying.
Chance added a new aspect to our Mandarin experience this week. I sat down and realized that Chance was watching a Chinese movie he had found on Netflix. The movie had English subtitles but Chance expressed that Netflix needed to have a better understanding of which language they decided to list.  The movie itself was actually in Cantonese but Netflix said the language was Mandarin in the explanation.  Furthermore, there were several times when the movie would show books that people were reading and the books were written in Mandarin.
Chance wanted a bit more continuity.  I made Chance turn the movie off to save for later viewing because a city was being ravaged by giant scary creatures and this was a bit intense for his younger siblings.
Maybe we should all start watching more movies in Mandarin with subtitles with Chance.  As long as the movie description is truthful about which language is being spoken and there are not scary beasts involved.

Chance finishing his Mandarin/Cantonese movie on the laptop.