Who thinks doling should have a latin course? I do!
I think it would be really cool to learn latin. I am currently learning esperanto and german.
Except that Latin is spoken all over the world (but mostly in the Vatican). It is the ecumenical language of the Catholic Church. So the whole "dead language" thing is a red herring, especially when compared with Klingon! Not sure what the behind-the-scenes politics are at the Incubator, but Latin is in every dimension more "alive" than Klingon, and I'm sure there is an army of classicists who would be ecstatic to contribute (there are tons of sites full of Latin learning resources run by such people). So, not really sure why this hasn't happened yet.
You might want to fix the spelling in your post title.
You are not alone in this desire, and people routinely post threads asking for Latin.
Someone has already been posting lessons as a model example of how a Latin course could go, and it has accompanying memrise lessons as well.
Latin is likely the most requested language for English on the site. Duo HQ must know this as Latin request threads gain the highest amount of likes of any request thread.
There has to be a reason for their prioritising other languages over Latin. I think that this reason is that Duo seems to want to market towards people who want to seem hip and bohemian; hipsters, namely. Hipsters don't want to learn a dead and scholarly language, they want to learn something like Swahili or Catalan so that they can be even more bohemian. (Nothing to do with Czech people, bohemianism is a lifestyle)
The sources of my hypothesis are the advertising style of the Duolingo videos, the languages that they've added so far, and mostly from Luis dressing like kind of like a hipster. I don't hate hipsters, but I am bothered when their interests are prioritised over mine. I want to learn Latin and so do a lot of the people who look at the Duo discussion forum and it would be not nice if we really are being neglected.