The zombie villager death message has the “technical” name to it
Whenever killed by the zombie villager instead of displaying “(player name) was slain by zombie villager” it displays what looks like the ID name: %entity.-zombie_villager_v2name.
Whenever killed by the zombie villager instead of displaying “(player name) was slain by zombie villager” it displays what looks like the ID name: %entity.-zombie_villager_v2name.