Following a restore anyware using the Symantec Recovery Disk (SRD), the regional and language settings can change from English UK to English US.
This issue is fixed in Service Pack 2 (10.0.2) for Symantec System Recovery (SSR) 2011. SP2 is available via LiveUpdate or here: http://www.symantec.com/docs/TECH186176.
The issue is also fixed in Service Pack 5 (9.0.5) for Backup Exec System Recovery (BESR) 2010. SP5 is available via LiveUpdate or here: