What I love about SharePoint is that even after working with it pretty much daily for over 6 years, you still keep learning new stuff almost every day. Today I run into a strange navigation issue when I had to copy and rename a site within Site Collection. Along the years (still remember my first SharePoint project like it was yesterday), I’ve learned to play safe, so I copied the site X instead of moving it, after which I renamed it to Y.
All good, except when I navigated to some other sites, Global (=top) Navigation still showed the old site title X. On some other sites, the title was the correct renamed Y. Also Content and Structure showed the old title.
What to do? Tried fiddling with the navigation settings of other sites and on that specific copied site in order to maybe refresh some cache holding navigation items. Usually it takes few seconds for the navigation to refresh in these kinds of renaming scenarios, but minutes passed and the old title was still there…but ONLY when being on certain sites. Something I hadn’t seen before.
Renamed the source site, and got exactly the same issue.
Well, went to flush object cache, just for the fun of it, no effect.
Opened Remote Desktop and recycled Application Pool, no effect.
Even did IISRESET, no effect. Conclusion: definitely wasn’t any cache related issue.
Noticed I had Multi Language User Interface (MUI) set for English for some of the sites, while having Finnish for few of them. Changed it to same language on all sites, BINGO!
When you define site title, you’re actually defining the title for the MUI language you’re currently using on the site. Change the MUI language and you can define different site title for that language, then when changing the MUI language, site title changes accordingly.
What was confusing was if some other site has MUI title set, it will show that MUI specific title in navigation when you go to some other site with that same language MUI selected.