Update default language for library add (#1416)

* Update default language for library add

* Add explicit photo library language to bootstrap server

Author: JonnyWong16

plexapi/library.py

@@ -226,15 +226,15 @@ def deleteMediaPreviews(self):
             section.deleteMediaPreviews()
         return self
 
-    def add(self, name='', type='', agent='', scanner='', location='', language='en', *args, **kwargs):
+    def add(self, name='', type='', agent='', scanner='', location='', language='en-US', *args, **kwargs):
         """ Simplified add for the most common options.
 
             Parameters:
                 name (str): Name of the library
                 agent (str): Example com.plexapp.agents.imdb
                 type (str): movie, show, # check me
                 location (str or list): /path/to/files, ["/path/to/files", "/path/to/morefiles"]
-                language (str): Two letter language fx en
+                language (str): Four letter language code (e.g. en-US)
                 kwargs (dict): Advanced options should be passed as a dict. where the id is the key.
 
             **Photo Preferences**

tools/plex-bootstraptest.py

@@ -612,6 +612,7 @@ def alert_callback(data):
                 location="/data/Photos" if opts.no_docker is False else photos_path,
                 agent="com.plexapp.agents.none",
                 scanner="Plex Photo Scanner",
+                language="en",
                 expected_media_count=has_photos,
             )
         )