Siri does not support Dutch yet. But he/she (depends where you live) understands a name, so you can ask him to dial a number. For instance, "call Hans". I added the word "home" to our home number and as a joke I started to ask him to "phone home". Now I use it every time I want to call somebody.
I can also dictate a message or ask him to find information for me on the internet.
And yes....he recognizes me ;-)
Have a nice first Advent.
P.S. keep your eyes on this blog (or your RSS reader), I am hosting a super give-away later this week.