Add more translated word for Korean and fix some word according to the context

[ipodipad]

To owner I don't know why below msg occurred. continuous-integration/appveyor/pr — AppVeyor build failed

[Felipefpl]

ipodipad - there is transifex for translations https://www.transifex.com/yabause/yabause/languages/ - just wait to be added as a translator. ;)

Also, you should join irc channel #yabause on freenode to talk about yabause. ;)