PO
%LANGUAGES{...}%
separator
"\n"
selection="%LANGUAGE%"
(none)
marker="selected"
$marker
selection
"selected"
format
" * $langname"
$langname
$langtag
en
pt-br
<select>%LANGUAGES{format="<option $marker value='$langtag'>$langname</option>" selection="%LANGUAGE%"}%</select>