The addon development documentation says that crowdin is being used for translations. So far so good.
One thing I could not find and answer to is, though, how often the translated strings are pulled form crowdin. I can see that there is an openhab-bot creating pull requests, where that one is being started, and how often, according to which rules translations are fetched, is still a mystery to me.
Oooooooookay, in which case, where do I apply and whom do I ask? The only other turkish translations, for ntp and astro bindings, were actually translated by myself