> The Korean language is considered one of the most scientific language on the planet.

It's considered that by lay people, largely due to Korean patriotism, not by real linguists (can you provide a source?)

> an HN'er should be able to read and write Korean in about an hour.

So, you're talking about the alphabet used to write the language, not the language itself. At best you've proven that Korean has a highly regular writing system. But I'd argue that the average HNer could learn to read, for example, Spanish in about two minutes.