doesn't a condition or concept almost always exist before the word for it

I'm not sure, even for human languages, but they would never have coined the term in xenolinguistics (link) if they hadn't needed it. But, seriously, dahil, if I run across a word I've never seen or used before, then the word does precede the concept. Also, if the word changes in meaning, then it precedes its (newer) concept.

Ceci n'est pas un seing.