Well, metathesis is rather easy to look up. And, for those who are not about to click, here's a short definition: "Transposition within a word of letters, sounds, or syllables, as in the change from Old English brid to modern English bird or in the confusion of modren for modern." [A-H] As nearly anybody can see from that quoted definition, metathesis it ain't.

Ceci n'est pas un seing.