code: public void removeTranslation(String locale) {
          LocaleCodeSpecification.assertCode(locale);
  
          Translation translation = getTranslation(locale);
          if (translation != null) {
              this.translations.remove(translation.getId());
          }
      }
docs: Removes the translation corresponding to the given locale code.
  
  @param locale locale code
  @throws java.lang.IllegalArgumentException if the locale is null or empty
  or contains other characters than letters and "-".