Yes indeed, Turkish and Arabic are not the same, hence they are two different translations: marked respectively "Arabic" and "Turkce" in the language selection dialog.
Arabic is a language with a "right to left" reading order... and Turkish is a language with a "left to right" reading order, just like English. As such, they both show fine as they should on my Messenger Plus!:
So, I'm not sure what you exactly mean, can you be more specific and/or give examples of what you mean?