P: Polish Language

Moderators, @Rikk Flohr: Photography, please move to Ideas.

I think Adobe prioritizes the languages it provides based on its estimate of the size of the potential market.  There was a feature request from many years ago to support Polish, and it received 5 votes:

https://feedback-readonly.photoshop.com/conversations/lightroom-classic/lightroom-support-polish-language-version-of-lightroom/5f5f450c4b561a3d423164b1 

There was a feature request in 2013 to support Russian, which eventually received 23 votes:

https://community.adobe.com/t5/lightroom-classic-ideas/lightroom-classic-support-for-russian-language/idi-p/12249137 

Adobe added Russian in 2020.

(Adobe looks at the number of votes as one measure of relative popularity of feature requests.)