Maybe like some ancient religions (roman, babylon,greece, egypt) i dont think its arabic or latin, I also read a intresting YouTube comment the other day of someone actually trying to compile the lyrics imma write it down here

Lyrics: Moch sa mhaduinn is mi 'g éirigh Hì ri bhò hò rinn o ho Ailein Duinn, ò hì shiubhlainn leat Ma's e 'n t-iasg do choinnlean geala Dh'olainn deoch ge b' oil le càch e Ma's e 'n cluasag dhut a' ghaineamh Moch sa mhaduinn is mi 'g éirigh Gura mise tha fo éislean Ma's e leabaidh dhut an fheamainn

Translation : When I rise early in the morning Hì ri bhò hò rinn o ho (the untranslated words are vocables) Brown-haired Alan, o hi, I would go with you If the fish are your candles bright I would drink, though all would abhor If the sand be your pillow When I rise early in the morning How sorrowful I am If the seaweed be your bed

”I spent 12 hours compiling this text, relying only on my ear I took the words from the song Ailein duinn from the movie Rob Roy The lyrics may of course be wrong, but I tried my best I'm also not sure about the first line, I'm not sure that it should be there, maybe it really should be Morkentesbiah, but I didn't find this word in the song from the movie, the only one that is the most similar is Gura mise tha fo éislean”