A lot of people in this thread have commented on their languages histories, so I'll get in my two cents.
Of course I'm a native English speaker and can command a decent vocabulary of both understanding and usege -- good for me, but what I'm ashamed of is my lack of fluency in French, that is more specifically French Canadian French.
I was born & raise in the Province of Quebec in the English environment that existed over 50 years ago. In their arrogance many "Anglophones" never bothered to learn French, including members of my family.
So speaking of arrogance, in my English Protestant secondary school, my French language teacher, (an Englishman from Britain), upon hearing someone using a typical French Canadian phrase in a French Canadian accent, said "There may be nothing wrong with the French Canadian language but we don't teach it here". What a grotesquely stupid attitude but quite prevalent in those days, fortunately not longer.
I left Quebec for Ontario in my early 20s and never did learn, as I ought, a proper command of (Canadian) French.