My desktop had the same language bar problem after I messed up (disable) some tasks under Task Scheduler.

Running the ctfmon.exe at startup can bring back the bar but I decide to figure out what went wrong.

After an hour try and error I found out I disabled the MsCtfMonitor tasks under the TextServicesFrameWork.

And bingo!! Once I enable the MsCtfMonitor task , my language bar shows up again every time I logon.