Thanks; I didn't know "idiom" is "idiotisme". Nice.
The examples from Figaro all seem to have their verb as a subjunctive in French, so "When pigs would fly" - we usually say "If pigs had wings", or "Yeah, and pigs might fly". Your translations don't carry the doubt that words like "might" and "if" impart. There are hardly any/no verbs in English that still have a subjunctive distinct from the indicative, a fact that I regret.
There are some places in England (north east) where they pronounce the subjunctive of "to be", even though it isn't written distinctly; they say "If I wear a rich man". I think it's from the German, as in "Wenn ich wäre".
The examples from Figaro all seem to have their verb as a subjunctive in French, so "When pigs would fly" - we usually say "If pigs had wings", or "Yeah, and pigs might fly". Your translations don't carry the doubt that words like "might" and "if" impart. There are hardly any/no verbs in English that still have a subjunctive distinct from the indicative, a fact that I regret.
There are some places in England (north east) where they pronounce the subjunctive of "to be", even though it isn't written distinctly; they say "If I wear a rich man". I think it's from the German, as in "Wenn ich wäre".