l

String l(String key);

i.e.,

org.zkoss.xel.fn.CommonFns

Returns the label of the given key defined in the internationalization labels.

The label is based on the current Locale (org.zkoss.util.Locales).

For 5.0.7 and later, an implicit object called labels was introduced, and it is more convenient to use.

For example,

<?taglib uri="http://www.zkoss.org/dsp/web/core" prefix="c"?>

<window title="${c:l('app.title')}">
 ...
</window>