We should have a site or page aimed at translators, giving a short introduction to translating for the Wikimedia projects and guiding potential contributors to different types of translations: content translations, technical translations, Meta translations. Compare whatcanidoforwikimedia.org. The point is to be able to reach out to people who are interested in translations, e.g. translation students or people who'd like to be translators, who could be interested but are unaware of the fact that we'd appreciate their help.
The website is not a solution in itself; it's a tool to use when communicating with potential translators.
Related (missing features that would be welcome):