Feedback on "Save & Continue" is not internationalized

When editing a document and Choosing "Save & Continue" a short feedback about the progress appears at the bottom of the page saying "Saving..." and then "Saved"
If one switches the XWiki to render its UI in a different locale, this text does not get translated.

I am not sure if this is because the text is not ready for I18N, or the translation is simply missing. At least I could not find it on l10n.xwiki.org