code: public List<LanguageProfile> readAllBuiltIn() throws IOException {
          List<LanguageProfile> loaded = new ArrayList<>();
          for (LdLocale locale : BuiltInLanguages.getLanguages()) {
              loaded.add(readBuiltIn(locale));
          }
          return loaded;
      }
docs: Reads all built-in language profiles from the "languages" folder (shipped with the jar).