Villagers without a profession have the default name of 'Nitwit'

Despite not being Nitwits, villagers that do not have a profession (technically the minecraft:none profession) have a name of 'Nitwit', even though there is a translation key of minecraft.entity.villager.none that is translated to Villager.

/summon minecraft:villager ~ ~ ~ {NoAI:1b}
/execute as @e[type=villager] run say @s