We have noticed that in SonarQube when we have installed the Spanish Pack plugin, the Last Analysis date is displayed incorrectly, with a {0} instead of the correct date.
I think your best bet is to raise an issue with GitHub - acalero/sonar-l10n-es – but it looks like this plugin hasn’t been maintained in a while! Maybe @acalero knows more about it, and what options are available for spanish-speaking users?
It’s been a long time since the last release and I suppose a lot of changes in labels and descriptions have changed. In fact, the documentation says it supports SonarQube 6.7 to 7.3
Let me check it out and see if we can release a new version to fix it and support 9.9 LTS and LATEST versions.