Added Korean translations (#414)

frontend/src/lang/index.js

@@ -2,11 +2,13 @@
 import de from './translations/de.json';
 import en from './translations/en.json';
 import fr from './translations/fr.json';
+import ko from './translations/ko.json';
 import pt from './translations/pt.json';
 import ru from './translations/ru.json';
 import uk from './translations/uk.json';
 import vi from './translations/vi.json';
 import zh from './translations/zh.json';
+
 import {createI18n} from "vue-i18n";
 
 // Create i18n instance with options
@@ -24,6 +26,7 @@ const i18n = createI18n({
     "de": de,
     "en": en,
     "fr": fr,
+    "ko": ko,
     "pt": pt,
     "ru": ru,
     "uk": uk,