"constructed"

I'm not sure about languages being constructed, but they are conventional (I side with the nomos side of the Cratylan argument rather than the physis one. Linguists have a feel for the drift of a language, i.e., how they change over time, but few can agree on how they came about. Chomsky posits that Universal Grammar is part of the human brain. I tend to think of language (i.e., a kind of symbolic calculus) as an extension of pattern recognition in other kinds of animals.

committee

The Académie française, founded by Cardinal Richlieu in 1635, is not really a committee, and the number of its members is 40. They are a little out touch with reality and their latest exploit was opposing constitutional recognition of regional languages (link).

Ceci n'est pas un seing.