On http://german.stackexchange we have the question for the German translation of "lookup table".
I'm very unsure we should allow such questions to some extend. But I think only on this site is a good chance to address the people who know the answer.
Most German developers don't care about German translations. Only those teaching SQL and Databases are eager to use only German words. I see a little chance to reach one of them here and to learn if they established a translation for this termini.
I could imagine to maintain some CWs here containing translations of standard terminology from English to some other languages.