diff --git a/README.md b/README.md
index 5727c4a..762bab7 100644
--- a/README.md
+++ b/README.md
@@ -95,6 +95,7 @@ Options:
                 See nfo_example.txt for more details
   --platform=STRING  List of platform(s) to upload to, comma separated.
                      Supported platforms are youtube and peertube (default is both)
+  --language=STRING  Specify the default language for video. See below for supported language. (default is English)
   -h --help  Show this help.
   --version  Show version.
 
@@ -106,6 +107,12 @@ Categories:
     comedy, entertainment, news,
     how to, education, activism, science & technology,
     science, technology, animals
+
+Languages:
+  Language of the video (audio track), choose one. Default is English
+  Here are available languages from Peertube and Youtube:
+    Arabic, English, French, German, Hindi, Italian,
+    Japanese, Korean, Mandarin, Portuguese, Punjabi, Russian, Spanish
 ```
 
 ## Features
@@ -120,7 +127,7 @@ Categories:
   - [x] privacy (between public, unlisted or private)
   - [x] enabling/disabling comment (Peertube only as Youtube API does not support it)
   - [x] nsfw (Peertube only as Youtube API does not support it)
-  - [ ] set default language
+  - [x] set default language
   - ~~thumbnail/preview~~ Canceled, waiting for Youtube's API support  
 - [x] Use a config file (NFO) file to retrieve videos arguments
 - [x] Allow to choose peertube or youtube upload (to resume failed upload for example)
diff --git a/lib/pt_upload.py b/lib/pt_upload.py
index 05e22da..669be5d 100644
--- a/lib/pt_upload.py
+++ b/lib/pt_upload.py
@@ -83,6 +83,12 @@ def upload_video(oauth, secret, options):
         # if no category, set default to 2 (Films)
         fields.append(("category", "2"))
 
+    if options.get('--language'):
+        fields.append(("language", str(utils.getLanguage(options.get('--language'), "peertube"))))
+    else:
+        # if no language, set default to 1 (English)
+        fields.append(("language", "1"))
+
     if options.get('--privacy'):
         fields.append(("privacy", str(PEERTUBE_PRIVACY[options.get('--privacy').lower()])))
     else:
diff --git a/lib/utils.py b/lib/utils.py
index 54c4b06..63c1f58 100644
--- a/lib/utils.py
+++ b/lib/utils.py
@@ -45,7 +45,38 @@ PEERTUBE_CATEGORY = {
     "animals": 16
 }
 
+### LANGUAGES ###
+YOUTUBE_LANGUAGE = {
+    "arabic": 'ar',
+    "english": 'en',
+    "french": 'fr',
+    "german": 'de',
+    "hindi": 'hi',
+    "italian": 'it',
+    "japanese": 'ja',
+    "korean": 'ko',
+    "mandarin": 'zh-CN',
+    "portuguese": 'pt-PT',
+    "punjabi": 'pa',
+    "russian": 'ru',
+    "spanish": 'es'
+}
 
+PEERTUBE_LANGUAGE = {
+    "arabic": 5,
+    "english": 1,
+    "french": 13,
+    "german": 11,
+    "hindi": 4,
+    "italian": 14,
+    "japanese": 9,
+    "korean": 12,
+    "mandarin": 3,
+    "portuguese": 6,
+    "punjabi": 10,
+    "russian": 8,
+    "spanish": 2
+}
 ######################
 
 
@@ -56,6 +87,13 @@ def getCategory(category, platform):
         return PEERTUBE_CATEGORY[category.lower()]
 
 
+def getLanguage(language, platform):
+    if platform == "youtube":
+        return YOUTUBE_LANGUAGE[language.lower()]
+    else:
+        return PEERTUBE_LANGUAGE[language.lower()]
+
+
 # return the nfo as a RawConfigParser object
 def loadNFO(options):
     video_directory = dirname(options.get('--file')) + "/"
diff --git a/lib/yt_upload.py b/lib/yt_upload.py
index 495c17b..23234a7 100644
--- a/lib/yt_upload.py
+++ b/lib/yt_upload.py
@@ -81,6 +81,10 @@ def initialize_upload(youtube, options):
     if options.get('--category'):
         category = utils.getCategory(options.get('--category'), 'youtube')
 
+    language = None
+    if options.get('--language'):
+        language = utils.getLanguage(options.get('--language'), "youtube")
+
     license = None
     if options.get('--cca'):
         license = "creativeCommon"
@@ -92,6 +96,7 @@ def initialize_upload(youtube, options):
             "tags": tags,
             # if no category, set default to 1 (Films)
             "categoryId": str(category or 1),
+            "defaultAudioLanguage": str(language or 'en')
         },
         "status": {
             "privacyStatus": str(options.get('--privacy') or "private"),
diff --git a/nfo_example.txt b/nfo_example.txt
index d2edce5..5ee2f8d 100644
--- a/nfo_example.txt
+++ b/nfo_example.txt
@@ -14,4 +14,5 @@ cca = True
 privacy = private
 disable-comments = True
 nsfw = True
-platform = youtub
\ No newline at end of file
+platform = youtube, peertube
+language = French
\ No newline at end of file
diff --git a/prismedia_upload.py b/prismedia_upload.py
index d0359d9..e606fb8 100755
--- a/prismedia_upload.py
+++ b/prismedia_upload.py
@@ -23,6 +23,7 @@ Options:
                 See nfo_example.txt for more details
   --platform=STRING  List of platform(s) to upload to, comma separated.
                      Supported platforms are youtube and peertube (default is both)
+  --language=STRING  Specify the default language for video. See below for supported language. (default is English)
   -h --help  Show this help.
   --version  Show version.
 
@@ -34,6 +35,13 @@ Categories:
     comedy, entertainment, news,
     how to, education, activism, science & technology,
     science, technology, animals
+
+Languages:
+  Language of the video (audio track), choose one. Default is English
+  Here are available languages from Peertube and Youtube:
+    Arabic, English, French, German, Hindi, Italian,
+    Japanese, Korean, Mandarin, Portuguese, Punjabi, Russian, Spanish
+
 """
 from os.path import dirname, realpath
 import sys
@@ -64,6 +72,7 @@ except ImportError:
          'see https://github.com/ahupp/python-magic\n')
 
 VERSION = "prismedia v0.3"
+
 VALID_PRIVACY_STATUSES = ('public', 'private', 'unlisted')
 VALID_CATEGORIES = (
     "music", "films", "vehicles",
@@ -73,6 +82,10 @@ VALID_CATEGORIES = (
     "science", "technology", "animals"
 )
 VALID_PLATFORM = ('youtube', 'peertube')
+VALID_LANGUAGES = ('arabic', 'english', 'french',
+                   'german', 'hindi', 'italian',
+                   'japanese', 'korean', 'mandarin',
+                   'portuguese', 'punjabi', 'russian', 'spanish')
 
 
 def validateVideo(path):
@@ -99,12 +112,19 @@ def validatePrivacy(privacy):
 
 def validatePlatform(platform):
     for plfrm in platform.split(','):
-        if plfrm not in VALID_PLATFORM:
+        if plfrm.lower().replace(" ", "") not in VALID_PLATFORM:
             return False
 
     return True
 
 
+def validateLanguage(language):
+    if language.lower() in VALID_LANGUAGES:
+        return True
+    else:
+        return False
+
+
 if __name__ == '__main__':
 
     options = docopt(__doc__, version=VERSION)
@@ -131,6 +151,11 @@ if __name__ == '__main__':
                                     validateCategory,
                                     error="Category not recognized, please see --help")
                                    ),
+        Optional('--language'): Or(None, And(
+                                    str,
+                                    validateLanguage,
+                                    error="Language not recognized, please see --help")
+                                   ),
         Optional('--privacy'): Or(None, And(
                                     str,
                                     validatePrivacy,