Web site localization EN-DE

!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
becomes
!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//DE"
source:
http://www.iana.org/assignments/language-tags
via
http://www.w3.org/

happy meta tag translating
very happy title tag translating
extremely happy error messages translating which you may be able to produce or maybe not. Error messages which you may be able to loacte in the perl, php, or html source - and then again not.

localization