The core namespaces have a canonical names instead localized ones.
For example for a Finnish wiki:
<ns id="2" case="first-letter" subpages="" canonical="User"
xml:space="preserve">Käyttäjä</ns>
But Proofreadpage uses the localized string too as canonical:
<ns id="250" case="first-letter" canonical="Sivu"
xml:space="preserve">Sivu</ns>
It should be instead:
<ns id="250" case="first-letter" canonical="Page"
xml:space="preserve">Sivu</ns>
Version: master
Severity: normal
URL: https://fi.wikisource.org/w/api.php?action=query&meta=siteinfo&siprop=namespaces|namespacealiases