Sourcegraph CEO here. Go to https://sourcegraph.com/beta to get early access and to vote for your favorite language. We hear you and are rapidly adding support for new languages. :)

(BTW: Passionate about a language and want to help us build Sourcegraph support for it, or know someone who'd be interested? Email me at sqs@sourcegraph.com. We can sponsor you. The latest requirements for adding a new language are not yet publicly documented, so contact us before getting started.)

Sourcegraph CEO here. We need to do a bunch of language-specific stuff to make search work well for finding definitions and usage examples, so we've scoped it for now. But we're almost ready to add more languages and index all repositories; check https://sourcegraph.com/beta to get early access and to +1 your preferred languages. This is the #1 request we get, and we can't wait to have Sourcegraph work for all code and more languages. :)