There's a
listing for the French language colourisation of
The Broken Ear on FNAC, a French retailer, which cites the publication date as 6th January 2027. It's the basic metadata attached to the ISBN issued for the book; the publication date could still change. That's almost exactly two years since the release of the colourised
Blue Lotus, which would be in line with the rate these editions have been published at. There's so far no mention of an English language edition, but there's equally nothing to suggest yet there
won't be one. We'll have to wait until the official announcement. (
Lotus was announced about a month before publication date.)
As for the format difference, I would assume it's because it wasn't settled until
Cigars of the Pharaoh, which is what they've used for the last two books, and retrospectively applied to
Soviets,
Congo and
America in French. Those books haven't been printed or reprinted in English (yet), hence the lack of uniformity. In a way it's sort of fitting, as the design of the original black and white books didn't settle into a regular format until Casterman took over from Le Petit Vingtième...