Do you need to wait until after the translation to start the server and communities? The interface may still be in English though that may change in the future. Ñ is supported so you could still populate the server with Spanish content? I'm learning Spanish at the moment and will miss r/languagelearning and others, would like to join your server 😊
I could start the Server or Communities right now but I'm talking to the admin of lemmy.world first. I have concerns about the Server cost. Hosting the communities in an existing server is another option but I'm worried they will delete the community in favor of English speaking communities if they are short in resources.