The list of supported language codes are: en,ar,ca,cs,cy-GB,da,de,es-LA,es,et,fi,fr,he,hr,hu,id,it,ja-JP,ko,lv-LV,nb-NO,nl,pl,pt-BR,pt-PT,ro,ru-RU,sk,sl,sv-SE,th,tr,uk,vi,zh-CN,zh-TW (these are the same values that you can find in the language dropdown within the product).