The pale garden biome is untranslated.
How to reproduce:
In the "Create New World" menu, go to the settings tab and select "Single Biome" as the world type.
Go to the world type settings and search for the item "Pale Garden."
Expected result:
The biome's name would be translated into the selected language.
Observed result:
The biome's name is displayed as its resource location.
Can confirm.