make sure you installed the updates in the correct order and start a new cab sender with every install.
Only install the languages that are installed on your phone and NOT all 22 ! otherwise you phone may go act strangely as this is in your case
install 1 - NODO OS UPDATES (7.0.7004.0 - 7.0.7403.0) + NODO LANGUAGE PACKS (7.0.7004.0 - 7.0.7403.0)
install 2 - MANGO OS UPDATES (7.0.7403.0 - 7.10.8107.79) + MANGO LANGUAGE PACKS (7.0.7403.0 - 7.10.8107.79) + DELL UPDATES
install 3 - TANGO OS UPDATES (7.10.8107.79 - 7.10.8773.98) + TANGO LANGUAGE PACKS (7.10.8107.79 - 7.10.8773.98)
---------- Post added at 02:47 PM ---------- Previous post was at 02:06 PM ----------
A nice rumor on WP Central concerning the 7.8 update ! :
http://www.wpcentral.com/big-rumor-windows-phone-78-coming-all-older-devices-matter-hours