Invalid word in german WYPS version

In one of my german WYPS games ranka bot played the word "DRÄNT" what is no german word but was accepted by the system.

The game is http://www.littlegolem.net/jsp/game/game.jsp?gid=1221053&nmove=3

Does it say anywhere which vocabularies/dictionaries are used for the WYPS in the various languages? In my WYPS games in Italian several words came up that I had never seen before and I can't find them in any available Internet vocabulary/dictionary.

I have never heard 'DRÄNT' (and I'm a born German and lived there for over forty years), but after checking, it comes from the verb 'to drain' (allow the water to get out). A friend of mine who is something like a plumber knew the word.

Typischerweise würde 'DRAINAGE' eher bekannt sein, aber 'DRÄNEN' ist wohl offiziell ein deutsches Verb.

aber ich hatte auch das Gefühl dieser Bot bescheißt...

http://www.scrabble-blog.de/wortlisten/jorgs-turnierwortliste/

there is word DRÄNT

Of course bots cheat (by definition).

@Aganju. As you are obviously old enough, you might remember the song

"Dränen lügen nicht" (interpreted by various artists)

What, in your opinion, is the favorite occupation of such a "Dräne" ?

@Michael X: unfortunately, that was my first association too (traumatic experiences in the childhood influence our whole live...).

The other option that comes to mind is the franconian pronunciation of 'tears', (in franconian, P->B; T->D; K->G; like the famous TV show with five D: diddel, deesen, demberamende).

And no, I don't live in 'Franken', but I work daily with people from there. Believe me, franconian english is really funny.

@Richard: This "turnierwortliste" contains only words up to 5 letters. That can't be the list that is used by the system (and the bots).

Otherwise there are a lot of very, very strange word in this list, e.g. ANLUV, BEGUM, CHEIB, DIVIS, and lots more.

I have to correct myself: All these words are valid (although very unusual) and can be found in the "Duden" or can be derived from words that are listed there. The question remains: What database does the system (and the bots as well) use?