Citoid adds long language shortcuts (en-US), but czech citation templates can handle only short ones (en) and users don't like those long ones. Could you please change the behavior for cswiki to add always a short form?
Citoid also adds our national Czech (cs-CZ) language if citing Czech reference, which is pointless. Could you disallow this behavior?
Both requested by users on Czech technical Village pump here.
The example of both problems is . Look for parameter "jazyk" (language)