code: public Translation getTranslation(String locale) {
          LocaleCodeSpecification.assertCode(locale);
  
          return this.getTranslations().get(locale);
      }
docs: Returns the translation corresponding to the given locale code.
  
  @param locale locale code
  @return the translation
  @throws java.lang.IllegalArgumentException if the locale is null or empty
  or contains other characters than letters and "-".