Hi there !
I have a little bug in AltStore PAL. My iPhone 17 (iOS 26.2) is configured in French with France as region, and the same for my iCloud account.
I wrote commonly in French so I have the French keyboard, and also in English like in this place, so I also have English keyboard installed.
I use a Ukrainian keyboard to have a Cyrillic keyboard and I also use a Japanese manuscript keyboard.
I discover that when I have a Japanese keyboard installed, AltStore automatically switch to Japanese. I need to uninstall the Japanese keyboard to recover AltStore to English.