You call it Lanven
Heems is annoyed by the fact that a lot of people mistakenly pronounce the word as “Lan-vin” when it should be pronounced “Lawn-vawn”.
Das Racist’s advocacy of correct pronunciation for the classic fashion house Lanvin can also be found here:
Of course the proper pronunciation is phonetically closer to lon-vehn; “vawn” is pretty much as far away as “ven”.
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