diff --git a/src/calibre/customize/__init__.py b/src/calibre/customize/__init__.py
index d087eb5351..e4f8bf99bf 100644
--- a/src/calibre/customize/__init__.py
+++ b/src/calibre/customize/__init__.py
@@ -449,7 +449,7 @@ class CatalogPlugin(Plugin): # {{{
                           ['author_sort','authors','comments','cover','formats',
                            'id','isbn','ondevice','pubdate','publisher','rating',
                            'series_index','series','size','tags','timestamp',
-                           'title_sort','title','uuid'])
+                           'title_sort','title','uuid','languages'])
         all_custom_fields = set(db.custom_field_keys())
         all_fields = all_std_fields.union(all_custom_fields)
 
diff --git a/src/calibre/library/catalog.py b/src/calibre/library/catalog.py
index 53432af7b7..a9c4b1a309 100644
--- a/src/calibre/library/catalog.py
+++ b/src/calibre/library/catalog.py
@@ -29,7 +29,8 @@ from calibre.utils.zipfile import ZipFile
 
 FIELDS = ['all', 'title', 'title_sort', 'author_sort', 'authors', 'comments',
           'cover', 'formats','id', 'isbn', 'ondevice', 'pubdate', 'publisher',
-          'rating', 'series_index', 'series', 'size', 'tags', 'timestamp', 'uuid']
+          'rating', 'series_index', 'series', 'size', 'tags', 'timestamp',
+          'uuid', 'languages']
 
 #Allowed fields for template
 TEMPLATE_ALLOWED_FIELDS = [ 'author_sort', 'authors', 'id', 'isbn', 'pubdate', 'title_sort',
@@ -601,7 +602,7 @@ class BIBTEX(CatalogPlugin): # {{{
                     bibtexc, db, citation_bibtex, addfiles_bibtex))
 # }}}
 
-class EPUB_MOBI(CatalogPlugin):
+class EPUB_MOBI(CatalogPlugin): # {{{
     'ePub catalog generator'
 
     Option = namedtuple('Option', 'option, default, dest, action, help')
@@ -5177,3 +5178,4 @@ Author '{0}':
 
         # returns to gui2.actions.catalog:catalog_generated()
         return catalog.error
+# }}}
diff --git a/src/calibre/library/database2.py b/src/calibre/library/database2.py
index 3782149512..f99830ca5a 100644
--- a/src/calibre/library/database2.py
+++ b/src/calibre/library/database2.py
@@ -3378,7 +3378,7 @@ class LibraryDatabase2(LibraryDatabase, SchemaUpgrade, CustomColumns):
             prefix = self.library_path
         FIELDS = set(['title', 'sort', 'authors', 'author_sort', 'publisher', 'rating',
             'timestamp', 'size', 'tags', 'comments', 'series', 'series_index',
-            'uuid', 'pubdate', 'last_modified', 'identifiers'])
+            'uuid', 'pubdate', 'last_modified', 'identifiers', 'languages'])
         for x in self.custom_column_num_map:
             FIELDS.add(x)
         data = []