diff --git a/rwx/sw/freetube/artists.py b/rwx/sw/freetube/artists.py
index 2981245..269c607 100644
--- a/rwx/sw/freetube/artists.py
+++ b/rwx/sw/freetube/artists.py
@@ -1,7 +1,12 @@
 """FreeTube artists."""
 
+from typing import TYPE_CHECKING
+
 from rwx import Object
 
+if TYPE_CHECKING:
+    from .playlists import Playlist
+
 
 class Artist(Object):
     """FreeTube artist."""
@@ -16,3 +21,4 @@ class Artist(Object):
         """
         self.uid = uid
         self.name = name
+        self.playlist: Playlist
diff --git a/rwx/sw/freetube/languages.py b/rwx/sw/freetube/languages.py
new file mode 100644
index 0000000..beeb173
--- /dev/null
+++ b/rwx/sw/freetube/languages.py
@@ -0,0 +1,24 @@
+"""FreeTube languages."""
+
+from typing import TYPE_CHECKING
+
+from rwx import Object
+
+if TYPE_CHECKING:
+    from .playlists import Playlist
+
+
+class Language(Object):
+    """FreeTube language."""
+
+    def __init__(self, uid: str, name: str) -> None:
+        """Set uid & name.
+
+        :param uid: identifier
+        :type uid: str
+        :param name: label
+        :type name: str
+        """
+        self.uid = uid
+        self.name = name
+        self.playlist: Playlist