According to the Narratives for Qlik help site, currently the only language is English. They are looking for input as to what other languages should be provide in 2017.
Yseop Savvy is the only multilingual language generation software that offers a plug-in for Qlik. You can read more about it here: Savvy by Yseop, a plug-in for Qlik & Excel or search for it on the Qlik Marketplace. Currently, Savvy writes in English and French but Yseop, the company behind Savvy is adding new languages all the time. Yseop's enterprise software currently writes in English, French, German and Spanish.