A solution for the missing Korean characters problem is exactly the same as for the Chinese: you need to make sure, that you use PD4ML
Pro (it does not matter if that commercial or evaluation version) and TTF embedding is correctly configured:
pd4ml-html-css-pdf-tips-tricks-f7/ttf-embedding-t42.htmlPD4ML examples pack (
http://pd4ml.com/examples.zip) includes
chinese_ttf sample, which illustrates the TTF embedding feature.