2 files changed, 16 insertions, 2 deletions
diff --git a/lib/pleroma/web/mastodon_api/views/status_view.ex b/lib/pleroma/web/mastodon_api/views/status_view.ex
index 50d8ebde9..2ae5e14aa 100644
--- a/lib/pleroma/web/mastodon_api/views/status_view.ex
+++ b/lib/pleroma/web/mastodon_api/views/status_view.ex
@@ -200,7 +200,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
       mentions: mentions,
       tags: reblogged[:tags] || [],
       application: build_application(object.data["generator"]),
-      language: object.data["language"],
+      language: get_language(object),
       emojis: [],
       pleroma: %{
         local: activity.local,
@@ -391,7 +391,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
       mentions: mentions,
       tags: build_tags(tags),
       application: build_application(object.data["generator"]),
-      language: object.data["language"],
+      language: get_language(object),
       emojis: build_emojis(object.data["emoji"]),
       pleroma: %{
         local: activity.local,
@@ -756,4 +756,8 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
   defp get_source_content_type(_source) do
     Utils.get_content_type(nil)
   end
+
+  defp get_language(%{data: %{"language" => "und"}}), do: nil
+
+  defp get_language(object), do: object.data["language"]
 end
diff --git a/test/pleroma/web/mastodon_api/views/status_view_test.exs b/test/pleroma/web/mastodon_api/views/status_view_test.exs
index d6884ac2c..8c53e6567 100644
--- a/test/pleroma/web/mastodon_api/views/status_view_test.exs
+++ b/test/pleroma/web/mastodon_api/views/status_view_test.exs
@@ -780,6 +780,16 @@ defmodule Pleroma.Web.MastodonAPI.StatusViewTest do
     assert status.language == "pl"
   end
 
+  test "doesn't show post language if it's 'und'" do
+    user = insert(:user)
+
+    {:ok, post} = CommonAPI.post(user, %{status: "sdifjogijodfg", language: "und"})
+
+    status = StatusView.render("show.json", activity: post)
+
+    assert status.language == nil
+  end
+
   test "with a source object" do
     note =
       insert(:note,