In RSS2 feeds, in WebFeed and AnnouncementFeed plugin, we provide localized data, but the element language contains journal primary language.
According to the https://www.rssboard.org/rss-language-codes:
The language employed in an RSS feed can be indicated in the language element,...
the language element should then also contain the UI language in the format ISO 639-1.
In RSS2 feeds, in WebFeed and AnnouncementFeed plugin, we provide localized data, but the element
language
contains journal primary language. According to the https://www.rssboard.org/rss-language-codes:the
language
element should then also contain the UI language in the format ISO 639-1.PRs: webFeed: https://github.com/pkp/webFeed/pull/3 ojs announcementFeed: https://github.com/pkp/ojs/pull/4368