While working on https://jira.xwiki.org/browse/XWIKI-14037, I noticed that the Menu Macro has GLOBAL visibility. This implies that Menu Translations should have GLOBAL visibility as well. But this will cause issues if you install the Menu Application on a sub-wiki because there is no fallback yet from GLOBAL visibility to WIKI in case of translations. In order to avoid this problem, I propose to restrict the installation of the Menu Application to the main wiki.
I am +1 for this. Thanks, Costi
