Auf Russisch

So...I've been getting a lot of Russian spam in my Yahoo inbox lately. My Gmail spam still seems to consist mainly of ads for cheap Viagra and other meds, Hottt XXX 16 year old virgins, and Rolex watches, of all things. But on Yahoo...it's all in Russian. Real Russian, Cyrillic alphabet and all. I keep marking the messages as spam, but they keep showing up in my inbox all the same. Today I got two identical messages from the same sender--oddly, the spam filter grabbed the first one and whammied that bad boy straight to my spam folder; but the second went to my regular inbox. I have two questions about all this:

1. What's behind this crazy Russian spam uptick? Maybe it's because This guy is right?

2. Is it possible to set my spam filter to capture any/all messages written in alphabets that I cannot read?

Help me, Obi-Wan Kenobi. You're my only hope!