what to do when bayes shows signs of poisoning???
those germal political mails are being flagged at Bayes_00 scores even though they are still hitting 20+ points.
First, that's not really a sign of poisoning. Poisoning involves a deliberate attempt to evade your bayes.
In this case, I doubt you've received much German email that was spam, and even if you have probably none of it resembled these messages.
What to do?
Train.
Most of the tokens in these messages are likely to be low-count for the average person that doesn't speak german, so it shouldn't take long before some sa-learn training will start raising their bayes scores.