How do I find out about language centric events in the SF Bay area?

I'm not sure if there is a single site/app for that, but it really helps if you are keeping an eye out for these things in your twitter, facebook, google+ streams.

I don't have many people from SF Bay area on my twitter, but I still found out about a couple of tech events, while I was there this summer.

Meetup has many good language and technology specific groups in the area.

Seconding jazondenizac's answer, and I wrote an answer to a similar (but not exactly the same) question to this recently that I think might help somewhat. http://news.ycombinator.com/item?id=4681717

Obviously beware that not all facets may apply 100%.