Polish speaker here this is a moderately sensible sentence that reads:

The ruthless Grzegorz Brzęczyszczykiewicz (actual name and surname) has departed from Strzebrzeszyn (town name) to Pszczyna (another town) via Szymankowszczyzna (some village). Although many times he was full of bile, oblivious to the results, he found the final happiness in a grass blade.

The last sentence makes little logical sense to me, ‘although’ doesn’t fit there. ‘happiness in a grass blade’ sounds like an idiom for a love of nature, but actually doesn’t ring any bell. While ‘final happiness’ is ominous as fuck.

So now we know why Graham’s Number was invented: to keep track of scores in Polish Scrabble.

Phonetic transcription using vaguely English conventions 'cause my IPA keyboard broke:

Bezvzglendnih Gzhegoazh Bzhenchish-chickyeveech virrooshiw zeh Sh-chebzheshinna pshess Shimmahnkofsh-chizneh do Psh-chinnih. Ee hoach nyerahz zalehvawa go zhooch, nyepomnih nastempstf znalazu ostatechnye sh-chensh-che vzh-dzh-bleh trahvih.

Notes:, merged ś/sz, ź/ż/rz; tried to keep readings of a, e, and y somewhat similar to the vowels in father, dell, and ick by doubling the following consonants or ending open syllables with h.

Ymreolwr diddordebol Grzegorz Brzęczyszczykiewicz a ddechreuodd o Szczebrzeszyn trwy Szymankowszczyzna i’r tu hwnt i Pszczyna. Ac er bod chwerthin yn ei lifo dro ar ôl tro, gan anwybyddu canlyniadau, fe wnaeth ddod o hyd i hapusrwydd yn y diwedd mewn blad o laswellt.

Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch

German is also a completely sensible language.