A:AnswerBasically it will answer any question that, if you did a Google search, the result would be separated into its own box at the very top. If you only get a list of websites, it probably won't work.
A:AnswerGoogle home will let you group and name the lights for each room. I don't believe they are intended to be used overlapping though. In fact you might confuse it with more than one connected to the same google account. The Google Home works without your phone at home, since it connects directly to the HUE account as well as the internet and wifi directly.
A:AnswerNot directly, but it supports IFTTT, so you can create individual applets on ifttt.com and from there have them act on 'Comcast Labs' that controls XFinity X1 boxes, but not Xfinity home
A:AnswerRight now, the device only has an input/output of English. (You speak English to it, it speaks English back) However, if you were to say, "How do you say potato in Japanese?" to Google Home, it would provide with the translation. Hopefully there will be multi-language support in the future.
A:AnswerSonos doesn't work with any interactive speakers (yet), but you can connect a Chromecast Audio to it and cast music from the google home to it. Not ideal but kind of works
A:AnswerGoogle announced that the device would be made available in Canada sometime in 2017.
http://mobilesyrup.com/2016/10/04/google-announces-at-pixel-keynote-that-google-home-canada/