Ominous Banner still called Illager Banner when the language is set to English (United Kingdom)

Steps to reproduce:

1. Set your language to English (United Kingdom)
2. Create/open a world in Creative mode
3. Search for "Illager" in the Creative inventory

Observed result:
The Ominous Banner shows up with the name "Illager Banner".

Expected result:
The Ominous Banner does not show up.