I've been wondering about the Polish thing. On the screenshot at the top of the page, it reads "Translate Selection to Polish," and I initially thought this might just be something gleaned from the author's locale, but the tld is .hu, and I recall seeing "Polish" as the default "international" language option on a number of services (such as Google Translate).

Is there a technical reason for this that Polish is defaulted to more often than not? Or is this just a me thing.

It's gleaned from my locale. .hu is irrelevant; my alternative keyboard on my system is Polish