i don't know why don't you ask a french person
old-fashioned is spelled "démodé" in French.
Charles aznavour
'Bonté divine !' (old-fashioned)
more old-fashioned, most old-fashioned
An old fashioned French dance, also Cajun slang for an informal dance.
what was the name of the old fashioned camera?
"Market towns" are "des villes de marché", or "des bourgs" in French (both terms old-fashioned)
des pierres précieuses, or des gemmes (literary and old-fashioned)
The adjective "old-fashioned" does not take singular or plural because it is an adjective. Only nouns (or other words acting as nouns) can be singular or plural. For example: Old-fashioned lady is one lady who's old-fashioned; old-fashioned ladies can be 2 or more ladies who are old-fashioned. In both cases, the adjective is the same; only the noun changes according to number.
unusual, extraordinary, old-fashioned
Old Fashioned Love was created in 1975.
I'm Old Fashioned was created in 1942.