In the forum rules it sais that I am not able to post any threads that are not in english. I plan on creating a thread for the korean guild I plan to make. Is it possible if I write in english and also in korean so it is easier for the new korean people to read the advertising thread? Or do I need to solely write the thread in english.
I doubt there would be a problem but don't take my word for it. A solution could be posting the same thread on the 'Other languages' section.
You can post it in both English and Korean in the guilds section, and you could probably post a Korean only thread in the Other Languages section if you wanted to point people there too. The rule is there because not all of us staff are able to understand other languages and google translate is only so reliable, so it's hard to moderate what you can't understand.