diff --git a/couchpotato/core/plugins/quality/main.py b/couchpotato/core/plugins/quality/main.py
index 3ed1a7a..75b09bb 100644
--- a/couchpotato/core/plugins/quality/main.py
+++ b/couchpotato/core/plugins/quality/main.py
@@ -298,7 +298,7 @@ class QualityPlugin(Plugin):
                     # Don't score twice on same tag
                     scored_on.append(ss(alt).lower())
 
-        # Check extention
+        # Check extension
         for ext in quality.get('ext', []):
             if ext == extension:
                 log.debug('Found %s with .%s extension in %s', (quality['identifier'], ext, cur_file))
diff --git a/couchpotato/core/plugins/renamer.py b/couchpotato/core/plugins/renamer.py
index bfe1fed..fd904b5 100755
--- a/couchpotato/core/plugins/renamer.py
+++ b/couchpotato/core/plugins/renamer.py
@@ -1284,7 +1284,7 @@ rename_options = {
     'pre': '<',
     'post': '>',
     'choices': {
-        'ext': 'Extention (mkv)',
+        'ext': 'Extension (mkv)',
         'namethe': 'Moviename, The',
         'thename': 'The Moviename',
         'year': 'Year (2011)',
@@ -1470,7 +1470,7 @@ config = [{
             'tab': 'renamer',
             'name': 'meta_renamer',
             'label': 'Advanced renaming',
-            'description': 'Meta data file renaming. Use &lt;filename&gt; to use the above "File naming" settings, without the file extention.',
+            'description': 'Meta data file renaming. Use &lt;filename&gt; to use the above "File naming" settings, without the file extension.',
             'advanced': True,
             'options': [
                 {