Interesting question, is there a glossary for New-Hamphire English? French used in Canada is the same used in France with regional adaption like any other language, written French is the same, speaking you'll have to deal with different accent (again regional).
I've seen a "Dictionnaire du Joual Québécois" (Slang Dictionary).
If you have specific terms or expression you'd like to understand, let me know, I may be able to help.
After I answered I did a quick search and came up with this link