It starts already if you have applicants for Czech, Thai, Urdu or Norwegian… or even Hindi. It’s one of the most spoken languages, but there are very few moderators. 
Or imagine you added subtitlers a while ago, and they finished the project, but are still not having enough contributions to become moderator (it was rather short). Do I have to remove them? Find a moderator who pretended to moderate? 
And of course, some may only focus on dramas that require QC or a VikiPass…