STEPS TO REPRODUCE
- Create a subwiki using the Standard Flavor by setting it as template
- Create a new subwiki using the template
The subwiki creation process is finished successfully.
The creation process seems to be stuck at Translations (for Jetty) and on Flamingo Themes (for Tomcat, if it has any relevance).
When accessing the (partially) created subwiki, it's displayed in a Slavic language.
The issue could not be reproduced on XWiki 12.4.