I have an error with forceLang

[EminDemiri]

I am trying in various ways but putting forceLang the plugin does not perform most of the page translation.

this is my code : if(lang_salvata == '') $("[data-translate]").jqTranslate('', { defaultLang : "en", path : 'languages/index'}); else $("[data-translate]").jqTranslate('', { path : 'languages/index', forceLang : lang_salvata});

what am I doing wrong?