Great answer to OP's question.  I have a question for you, though I understand if you won't or can't answer it: Is what you wrote above advice given to you by Theymos, or is your reluctance to delete posts or to be a strict moderator in the Spanish section a personal choice?  Theymos rarely gives his thoughts on forum moderation to the community, so I'm just wondering.

And the Spanish section doesn't have a dedicated ANN section for projects if I just looked at the list of sections correctly.  Where are these threads being posted?  Is it in the Spanish Tokens section?  If that's the case, I'd say ignoring the whole section is a good option if altcoins and/or tokens don't interest you--which is the case for me, and I've got the whole altcoin array of sections on ignore.  I know it's not an ideal solution (as OP even pointed out), but if altcoins aren't your thing, it's the next-best one.

Welsh, I'm sure you're doing a good job moderating the Spanish section, but it'd be nice if Theymos did appoint a native speaker as a mod.  It's hard for me to imagine that there aren't any good candidates around who'd be willing to take the position.