Korean language support

Hello everyone,

i am currently implementing an email in different languages.
So far, so good. Most of the languages seem to work.

However, I want to create a korean locale and use a new property-file for that email.
As it seems, the korean languages does not fit with the standard encoding provided by keycloak (or the one used by the freemarker template language).

Any ideas if and how this usecase can be achieved?