Recently we’ve been seeing a number of spam comments written in Cyrillic (Russian) characters. Because they are not in English, they slip past anti-spam plugins like Akismet and Anti-Spam Bee.
What to do?
Jeff Starr of Perishable Press suggests adding the most common Cyrillic characters to your comment moderation file.
If you expect to get comments from visitors writing in other languages, of course, this might not be a good idea. But for normal blogging activity, especially if you prefer to leave comments open indefinitely, take a look at Jeff’s article and consider implementing his suggestions.