François Bonzon, 04/03/2013 18:22:

I confirm I now see interwiki language links originating from Wikidata in <language>wiki-<date>-langlinks.sql.gz dumps, with the format described in the 2nd link you sent. However, this is a MySQL dump, not a XML dump.

Language links are then no more available in XML data dumps?

I guess not, except – probably – in the XML data dumps for Wikidata itself, in whatever weird format ContentHandler makes them into.

Nemo