code: private void setLanguageFilters(String filters) {
  		this.filterLanguages = new HashSet<>();
  		if (!"-".equals(filters)) {
  			Collections.addAll(this.filterLanguages, filters.split(","));
  		}
  	}
docs: Sets the set of language filters based on the given string.
  
  @param filters
  comma-separates list of language codes, or "-" to filter all
  languages