French spoken by the Quebecois. Regular French by all means except the
pronunciation and some jargons, which makes the "regular" Frenchman feel
lost in translation, Bill Murray style.
In fact so lost that movies starring Quebecois French speakers have subtitles for other French speakers in case they don't
understand.
Quebecois French: Bonjour monsieur, comment allez-vous?
Other
French speaker: Excusez-moi, je n'ai pas compris. Pouvez-vous repetez s'il vous plaît?
Quebcois French: *grumble*
Other
French Speaker: *strokes beard while looking confused*