angularjs - Arabian language doesn't work in angular-gettext? -

i prepared ar.po file translations, compile translations.js (along other languages), when try setcurrentlanguage("ar"); doesn't appears, see default string constants instead. however, other languages work perfect, example setcurrentlanguage("fr");

edit:

i can see "[missing]" near every string when gettextcatalog.debug = true;. seems angular-gettext doesn't see arabian strings, exists in translations.js.