Love this and was my first introduction to the <ruby> HTML element (this feels like a great expanded use case). Also couldn't agree more re: your point on the resurrection of "old internet" blogs, it's a trend I'm very much enjoying.
Ruby is used extensively for Japanese (hiragana) and Chinese (bopomofo) -- you can see it on wiktionary, e.g. in the definition of manga [1]. The Rules for Simple Placement of Japanese Ruby spec [2] provides various examples of ruby formatting and layout.
rhdunn|1 month ago
[1] https://en.wiktionary.org/wiki/manga#English [2] https://www.w3.org/TR/simple-ruby/