I totally agree that stacking is very important to render many of the world's languages. And it will be a slog to get to 99.9999% support. Eventually I will figure all of that out. But I am already happy-that I support ~99.98% of world's online users with just Alphabets + CJK in my demographic according steam survey: <https://store.steampowered.com/hwsurvey/Steam-Hardware-Software-Survey-Welcome-to-Steam>
Language Support chart:
