code: private Long getLanguageId(final String _language)
      {
          Long ret = null;
          try {
              final QueryBuilder queryBldr = new QueryBuilder(CIAdmin.Language);
              queryBldr.addWhereAttrEqValue(CIAdmin.Language.Language, _language);
              final InstanceQuery query = queryBldr.getQuery();
              query.executeWithoutAccessCheck();
              if (query.next()) {
                  ret = query.getCurrentValue().getId();
              } else {
                  ret = insertNewLanguage(_language);
              }
          } catch (final EFapsException e) {
              DBPropertiesUpdate.LOG.error("getLanguageId()", e);
          }
          return ret;
      }
docs: find out the Id of the language used for this properties.
  @param _language Language
  @return ID of the Language