What languages are supported?
JungleMail languages depend on SharePoint language packs installed in your site collection. Currently, JungleMail for SharePoint 2013/2016/2019 comes with English and German language packs. JungleMail for SharePoint 2010 comes with 5 language packs: English, French, Dutch, German and Finnish. If you use any other language pack for SharePoint, JungleMail will automatically be set to English.