I don't have a Vietnamese community in which I belong to in Fresno. It's part of the reason why I get homesick a lot. I don't consider my Vietnamese good enough to teach our kids the language, and even when I've tried, it has been too difficult since I'm the only one they know in Fresno who speaks it. I really do value my cultural background, but it's so hard to pass something on when I'm the only one to do it.
When we're in Edmonton, they're surrounded by Vietnamese people, the culture, and the language. Here's a video of Jeremy learning how to count to 3 in Vietnamese (1 is "mot," pronounced moak, 2 is "hai", pronounced hi, and 3 is "ba", pronounced baa).