The division of political ideologies into left and right derives from the French Parliament which had the monarchists on the right and the liberals on the left.
The names yes, but the basic conflict is much older, Europe itself had the Guelph-Ghibelline conflict.
It is, it’s the UK that left (the EU, not the continent).
That the conflict between feudal lords (French aristocrats / Ghibellines) and urban merchants (Guelph burghers / French Girondists) is much older than the French Revolution. The pope and emperor were the figureheads, but the lords and merchants were the power blocs.