We have be-tarask.wikipedia.org, but when we enter langcode be-tarask into PetScan, it replies whit bad request page. Same happens for previous langcode be-x-old.
The only way is to enter langcode with underscores be_x_old, but then on the results page all links to pages are broken as they outputed with these underscores instead of correct hyphens or current langcode (be-tarask). Also query cannot be run once again as undersores stripped from Language field.
Possibly it happens because of db name on servers left whit old lang code be_x_oldwiki or something like that.
Please fix Language field to accept both be-tarask and be-x-old langcodes (and possibly other langcodes with hyphens). Also links to articles in results list should be fixed.
Working query example: https://petscan.wmflabs.org/?language=be_x_old&project=wikipedia&depth=1&categories=Былыя%20сельсаветы%20Беларусі&combination=union&ns%5B0%5D=1&sortby=title&&doit= But works only with direct link and cannot be run once again from webpage as desribed above.
Thanks! And best regards.