Steps to Reproduce:

1. Get trial omen status
2. Go to trial chambers
3. Search for normal trial spawners and make them convert to ominous trial spawners
4. Use /kill @e[type=ominous_item_spawner] command several times to kill ominous item spawner

Observed Results:
The name of ominous item spawner displays as entity.ominous_item_spawner.name.

Expected Results:
The name of ominous item spawner should display as Ominous Item Spawner.

How to Fix:
Adding following translation key in language file will resolve this issue.

entity.ominous_spawning_particle.name=Ominous Item Spawner