Take these steps if you need Adobe Premiere, Adobe Photoshop and/or Adobe After Effects installed in english while your operating system runs a different language:

Adobe After Effects:
In your Documents folder create an empty document called: ae_force_english.txt

Adobe Premiere Pro:
* Create a new project (or open one)
* Hit CTRL+F12
* In this window click the 3-minus-menu thingy and select „Debug Database View“
* Look for „ApplicationLanguage“ and change it to „en_EN„

Adobe Photoshop:
Go to the directory the program has been installed to (e.g. Program Files\Adobe\Adobe Photoshop 2020)
and there to the \Locales\de_DE\Support Files folder.
Find the language file, e.g. tw10428_Photoshop_de_DE.dat and rename the file extansion to something different e.g. tw10428_Photoshop_de_DE.bak.

Yeah…it’s sooo easy.