Canadian's tend to refer to walleye as pickerel, or the french word dore (I adore my dore), especially in northern Ontario & Quebec. Twenty years ago if you said the word walleye, nobody would know what you were talking about. Today, the walleye terminology is becoming more common at least among anglers I suspect because of marketing of lures, fishing shows, cable tv, internet ect. When I was growing up in Northern Ontario people used local spoons, minnows and night crawlers for the most part and the fishing show was a local show of two radio announcers who went to local lakes, shot the sh.t, and never caught fish. Whatever name you call it by, it is likely easier to remember than Stizostedion vitreum. Even though I first learned of walleye by association with name pickerel, I tend to use walleye more often now.
As for the confusion with chain pickerel by canucks, well that is because chain pickerel do not extend much north beyond the Great Lakes so by and large we are not familiar with catching these fish in the smaller inland lakes.