The patch is against miscfiles-1.3/languages from ftp.gnu.org.
My reference is glibc-2.2.4/locale/iso-639.def and ISO 639-2 (see http://lcweb.loc.gov/standards/iso639-2/langcodes.html)
2002-01-09 Ole Aamot oka@ping.uio.no
* languages: Add three 2-letter codes in ISO 639 for Nordic dialects:
nb:Norwegian bokmaal nn:Norwegian nynorsk se:Northern Sami
--- languages.1.3 Fri Oct 20 08:03:41 2000 +++ languages Wed Jan 9 16:30:48 2002 @@ -83,6 +83,8 @@ ne:Nepali nl:Dutch no:Norwegian +nb:Norwegian bokmaal +nn:Norwegian nynorsk oc:Occitan om:(Afan) Oromo or:Oriya @@ -98,6 +100,7 @@ rw:Kinyarwanda sa:Sanskrit sd:Sindhi +se:Northern Sami sg:Sangro sh:Serbo-Croatian si:Sinhalese