Rooster Playlist Importer Premium added support for some common Korean sentence endings. I’m still trying to do some research—in between regular TL studies—to provide feedback on the types of more common endings to put into this feature (as I noted that I’m still a beginner), but it makes me excited about the possibilities!
Something I noticed about programs that support a wide variety of languages is that language-specific changes/changes that may only affect a handful of languages (in comparison to the current catalog of languages) are much slower or don’t tend to happen as often.
Even the transliteration feature—which I don’t use—took a while to implement (and still has some bugs for those who don’t want to use it). Still, even that feature aids language learners across more languages than having a “Korean sentence endings splicer” feature.
So, it’s not likely that LingQ will implement anything like it soon since it “only” affects Korean Language Learners.