The [en-GB strings file](https://github.com/K8TIY/IPAPalette/blob/master/Localization/en_GB.lproj/Localizable.strings) seems to expect that anything not included will fall back to regular en. It does not. <img width="735" alt="Palette window with unlocalised strings" src="https://user-images.githubusercontent.com/2392122/148147634-bd6a0604-4d6f-4aa4-9b41-9e7a7869e4a0.png">