Pole here. Trivial. Then again, I studied in Denmark, so I know how to read those fancy letters.
Russian here. Was easy to read. Took a few seconds to figure out the sounds for the letters I didn't knew, and, of course, it looks odd so just glancing over the phrase doesn't work - but no issues otherwise. Don't know any Nordic languages.
룼키 야짘 나 한굴 볼체 틀룯나 폰얕.
Ez e törk ay ken sey dat dis fred iz may feyvrıt on eyçen soğ fağ. Ay uandır if a fing layk dı OP'yz iz possibıl uif avır languicis dat hev regular and fonıtik spelling rûls?
Translation: As a Norwegian, it wasn't too hard to read your writing like this. I wonder how difficult it is for a Slav to understand Norwenglish...
African here. Was readable in second pass. Pretty cool trick though.