Fix subtitleLanguage attribute (#1308)

Author: iDentitY4

plexapi/video.py

@@ -521,7 +521,7 @@ def _loadData(self, data):
         self.showOrdering = data.attrib.get('showOrdering')
         self.similar = self.findItems(data, media.Similar)
         self.studio = data.attrib.get('studio')
-        self.subtitleLanguage = data.attrib.get('audioLanguage', '')
+        self.subtitleLanguage = data.attrib.get('subtitleLanguage', '')
         self.subtitleMode = utils.cast(int, data.attrib.get('subtitleMode', '-1'))
         self.tagline = data.attrib.get('tagline')
         self.theme = data.attrib.get('theme')
@@ -691,7 +691,7 @@ def _loadData(self, data):
         self.parentThumb = data.attrib.get('parentThumb')
         self.parentTitle = data.attrib.get('parentTitle')
         self.ratings = self.findItems(data, media.Rating)
-        self.subtitleLanguage = data.attrib.get('audioLanguage', '')
+        self.subtitleLanguage = data.attrib.get('subtitleLanguage', '')
         self.subtitleMode = utils.cast(int, data.attrib.get('subtitleMode', '-1'))
         self.viewedLeafCount = utils.cast(int, data.attrib.get('viewedLeafCount'))
         self.year = utils.cast(int, data.attrib.get('year'))