message: Add function to display i18n keys in UI
  Avoids having to load translations in riot-web tests
diff: @@ -37,6 +37,13 @@ export function _t(...args) {
  return counterpart.translate(...args);
  }
  +// Allow overriding the text displayed when no translation exists
  +// Currently only use din unit tests to avoid having to load
  +// the translations in riot-web
  +export function setMissingEntryGenerator(f) {
  + counterpart.setMissingEntryGenerator(f);
  +}
  +
  export function setLanguage(preferredLangs) {
  if (!Array.isArray(preferredLangs)) {
  preferredLangs = [preferredLangs];
  