By reading the posts I could find on Error: "01000: Changed language setting to us_english." it seems like the error might have something to do with sqlsever. However, I haven't been able to find a solution to the problem I will keep looking.
If you are using sql server you might be able retrieve a list of all the error codes from the database. Not sure if this would work:
I found this which, might explain things.
'Originally posted by FreeVBCode.com
SELECT * FROM sysmessages
off the master table