Lens of Deciphering?

[Shadekeep]

I'm curious, can a Lens of Translation be taught a cipher? So that it could be used basically as a magic "secret decoder ring" kind of gizmo?

I ask because a cipher is technically distinct from a language. For example, the color "black" is "noir" in French. So a Lens that knows English and French would translate those two back and forth. But in a cipher, "black" might be "cmbdl" from a simple rot-1 alphabetic substitution. This isn't actually a word in another language, it's the same word but enciphered. Should a Lens still work when a word is enciphered by a standard rule, or does it operate solely on the principle of a lexicon, where it knows the equivalent words between two languages based on their meaning?

On a tangent from this, I pretty much assume that when a word exists in one language with no equivalent in the other, a Lens renders it phonetically in the target language. Like how in Star Trek some words in Klingon or Vulcan don't have Terran equivalents, so they use the original word in the native language.