Missing translation into right Main Menu after importing a xar into a subwiki

1. Login with Admin on XE 8.1 instance.
2. Export this wiki as a xar, using:
http://127.0.0.1:8080/xwiki/bin/admin/XWiki/XWikiPreferences?editor=globaladmin&section=Export
3. Create a sub-wiki.
4. Check the right Main menu of that new subwiki.
5. Import the xar in the new subwiki.
6. Check again the right Main menu

Actual result:

• Instead of Home link, you get "platform.wiki.drawer.homeWiki"