String l(String key);

i.e., org.zkoss.xel.fn.CommonFns#getLabel(java.lang.String)

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

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

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>