"Because Turgal refuses to give up, nobody can defeat him."
Translation:jeghQo'mo' turghal jeylaH pagh.
That's true; I don't know whether or not they're completely interchangeable, they appear to be used similarly. At the very least, qeylIS lIjlaHbogh pagh and qeylIS lIjlaHbe'bogh vay' have both been used to refer to "Kahless the Unforgettable".
I've added jeylaHbe' vay' as an accepted translation; thanks!