Cairn is reportedly developing

“…an international edition which will provide an interface in English, enabling non-French speaking scholars to discover content of interest published in French.”

Although Google already handles that interface translation automatically, and in a very speedy and seamless manner. And most Cairn articles appear to have substantial abstracts in English, complete with English keywords. JURN already directly indexes the circa-239,000 open PDF articles that are freely available via Cairn.