The Jesus Prayer...

In English, Greek, Russian and Latin, courtesy of Edward:

Lord Jesus Christ, Son of God, have mercy on me, a sinner.
Κύριε Ιησού Χριστέ, Υιέ του Θεού, ελέησόν με τον αμαρτωλόν.
Господи Исусе Христе, Сыне Божий, помилуй мя грешнаго.
Domine Iesu Christe, Fili Dei, miserere mei, peccatoris.

A few days ago, I’ve found its Arabic translation:

ربي يسوع المسيح،يا ابن الله،ارحمنا نحن الخطأة

Now, I know there are a substantial number of readers who are able to read Greek and Cyrillic characters, so there is no need for transliteration, I think.

As for Arabic, it’s roughly pronounced “ya rabi yasoo almassieh, ya ebne ellah, arhamana nahno el khata”, which, I believe translates ‘a sinner’ as ‘the sinner’.

[Tip of the hat to Shaghayegh for the Arabic transliteration]