Hi Charles,
Enchere de Rencontre without an initial pass is a 4 card fit in a major
and a good five card minor with around 8/9 honour points and is shown
by jump bidding the minor. After an initial pass, it shows a four
card fit in whatever suit partner bid with a good five card suit and
near opening values and again is shown by jump bidding the five card
suit.
While 4C in your example is showing a control in clubs and an implicit
fit in spades, it isn't called an Enchere de Rencontre, it's just a
control (BTW the word "cuebid" in french only means a bid of an
opponents suit as opposed to a control :-). Bizarrely it exists as a
verb as well - cuebidder! And even though they have a perfectly good
word of their own jump also exists as a french verb - jumper!!).
Jacoby 2NT doesn't appear to exist in French, although I guess some
people will have heard of it - I hadn't until I googled for it. Jacoby
Transfers are also not known - the French call theirs Texas Major and
Texas Minor, but it seems to be just Jacoby as Texas transfers are
something different elsewhere in the world!
Regards
Keith