code: public LsSurveyLanguage getSurveyLanguageProperties(int surveyId) throws LimesurveyRCException {
          LsApiBody.LsApiParams params = getParamsWithKey(surveyId);
          List<String> localeSettings = new ArrayList<>();
          localeSettings.add("surveyls_welcometext");
          localeSettings.add("surveyls_endtext");
          params.setSurveyLocaleSettings(localeSettings);
  
          LsSurveyLanguage surveyLanguage = gson.fromJson(callRC(new LsApiBody("get_language_properties", params)), LsSurveyLanguage.class);
          surveyLanguage.setId(surveyId);
          return surveyLanguage;
      }
docs: Gets language properties from a survey.
  
  @param surveyId the survey id of the survey you want the properties
  @return the language properties
  @throws LimesurveyRCException the limesurvey rc exception