"Error: 11000 - sp_ordr failed: Invalid NLS_LANG.." after Oracle version or patch upgrade (4297557)

After an Oracle version or patch upgrade you are seeing the following in the event log with Read exiting due to error:

07/09/07 15:33 Process exited sp_ordr  (for o.mbprd511) [pid = 12923] - exit(1)
07/09/07 15:33 Error: 11000 - sp_ordr failed: Invalid NLS_LANG [sp_ordr/12923]
07/09/07 15:33 Error: SP_ORD_NLS_LANG was set to a bad value. Please reset to default or correct with proper value and RESTART reade
r.  Exiting. [sp_ordr/12923]
07/09/07 15:33 Error: 12035 - OCISessionBegin  failed with ORA-12705. [sp_ordr(osp)/12923]
07/09/07 15:33 Notice: Oracle env - mbprd511:/app/oracle/product/920 [sp_ordr(pdb)/12923]
07/09/07 15:33 Process launched: sp_ordr (for o.mbprd511) [pid = 12923]
07/09/07 15:33 Logging user command: oracle start read