I'm glad you're so driven at a young age. I have not been through the Canadian school system so I cannot tell you what your chances are. But you might ask your current counselor what schools the alumni at your HS have been accepted to. It'll give you an idea of where you are at compared to other students. I'm not in the Linguistics field so I also can't comment on whether or not your chances are better due to your fluency in multiple languages, though it sounds like it probably will help. One thing to note about your Iceland visit, if you plan on writing about it, make sure you're not just writing about it to "show off" or just write about it, you want to make sure you illustrate how this trip affected you as a person or its significance in your life...remember that people can learn significant things at any time in their life, doesn't necessarily have to be a special trip.
I would definitely talk to counselors at your school or even try to contact students/professors at the school you intend on applying to get tips.