I'm not averse to koreans, quite the contrary, apart from expecting me to treat them like chinese people, and being angry about that, I like them. I like all asians, actually. I dunno even what to say 'I identify as a Taoist' and 'I'm 1/8th indonesian'.
But seriously, it would be a great thing if tags indicating languages got a special importance and they didn't show up at the top of trending and everything for us since we can't read their pretty circle-laden script. (I like circles. Personally huge fan of Georgian script for its circliness).
If nothing else, a tag filter on feeds would be a sweet thing to make. I am in dev so I know there is a hivemind thing, and maybe the original core C++ code could also add this, really it doesn't matter, but it makes no sense for me to open up this page and see the enthusiastic, active koreans always for the first two pages of the feed.
We get it, korea loves this type of platform currently.
I'm building a wallet and eventually will include the forum in it, and such fine grained control of the central tags feature will be part of it. The hot/trending/new/promoted API doesn't give a damn about the tags API and that's a sad thing. But it will be fixed.
So, I read and reply to nearly every post regardless of its language. I simply use Google translate.
In fact, I would not want this feature.
However the nice thing is, we can implement the feature that you described, and still allow for a multilingual view of blurt.
I think the language should be pinned to the tags, or added to the tags so it can be filtered this way. And on the other side, language translation like facebook does. Actually, on-chain protocol it could be a sidechain that pays people to write language translations for popular posts that override automatic ones.