Thanks for this. We've had these requests in the past (http://lists.wikimedia.org/pipermail/social-media/2014-July/000667.html) and we're still trying to figure out a viable way to promote this sort of content without completely ignoring English language followers. In the past we've proposed providing a quick summary illustrating what the tweet is about (https://twitter.com/Wikimedia/status/467156246051975168) - I think that's one of the best options we have at the moment. In any-case, We'll go ahead and re-tweet this from @Wikimedia and share it through Facebook through a targeted (Spanish language) post. 

Thanks!

Carlos M.