While resource bundles offer a good method to isolate localized text snippets, it's sometimes interesting to be able to conditionally display parts of templates with lots of markup. For this purpose, resource bundles are actually awkward to use. Templates are therefore able to set blocks automatically to values, according to the default localization language ({{L10N_DEFAULT_LANGUAGE}} configuration parameter). This can be done with the {{<!\-\-B 'LANG:id:language'\-\->}} block syntax.