This is a poeticized version of the standard translation for these prayers. I do not know who translated them originally, but the translation is included after the poeticized version.
Sri Nrsima Kavaca
And now I shall recite the hymn once spoken by Prahlad,
Sri Nrsima-kavacha, which the learned souls applaud.
Of prayers it is most pious, and its transcendental sound
resolves the greatest problems and protects one all around.
This hymn bestows all opulence of which one may be