Today, I received a copy of LINQ im Einsatz. This is the German translation of LINQ in Action. It's now available from Amazon.de and from Hanser.
Bonus: The German version is bigger than the English one. It contains chapter 14, which covers LINQ to DataSet and is provided in English only as a PDF download from Manning's website.
Maybe we'll see translations in other languages next. French would be a good idea, for example ;-)
Viel Spaß beim Lesen!