About [[MediaWiki:Newarticletext/uk]]
Something is definitely wrong with the message: https://uk.wikiquote.org/w/index.php?title=Купкеркно&action=edit but it seems that it's on the part of the parameter
«див. [статтю]». In source it's «див. [$1 довідкову статтю]»
Oh I see, MediaWiki:Newarticletext/uk was expecting "helppage" to be a wikilink while it's an URL. Fixed by updating the translation.