diff --git a/lib/bds/ai/one_shot.ex b/lib/bds/ai/one_shot.ex
index 7c30d63..650e868 100644
--- a/lib/bds/ai/one_shot.ex
+++ b/lib/bds/ai/one_shot.ex
@@ -172,7 +172,7 @@ defmodule BDS.AI.OneShot do
     with {:ok, endpoint, model, mode} <- Runtime.resolve_target(operation, opts),
          :ok <- Runtime.validate_target(operation, model, mode),
          {:ok, payload} <- resolve_image_data_url(payload),
-         request <- build_one_shot_request(operation, payload, model),
+         request <- build_one_shot_request(operation, payload, model, opts),
          {:ok, response} <-
            runtime.generate(Runtime.endpoint_with_model(endpoint, model), request, opts),
          {:ok, json} <- extract_json_response(response),
@@ -187,7 +187,7 @@ defmodule BDS.AI.OneShot do
 
     with {:ok, endpoint, model, mode} <- Runtime.resolve_target(operation, opts),
          :ok <- Runtime.validate_target(operation, model, mode),
-         request <- build_one_shot_request(operation, payload, model),
+         request <- build_one_shot_request(operation, payload, model, opts),
          {:ok, response} <-
            runtime.generate(Runtime.endpoint_with_model(endpoint, model), request, opts),
          {:ok, json} <- extract_json_response(response),
@@ -197,55 +197,65 @@ defmodule BDS.AI.OneShot do
     end
   end
 
-  defp build_one_shot_request(operation, payload, model) do
+  defp build_one_shot_request(operation, payload, model, opts) do
+    language = Keyword.get(opts, :language)
+
     %{
       operation: operation,
       model: model,
       max_output_tokens: @default_max_output_tokens,
       messages: [
-        %{"role" => "system", "content" => one_shot_system_prompt(operation)},
-        %{"role" => "user", "content" => one_shot_user_content(operation, payload)}
+        %{"role" => "system", "content" => one_shot_system_prompt(operation, language)},
+        %{"role" => "user", "content" => one_shot_user_content(operation, payload, language)}
       ]
     }
   end
 
-  defp one_shot_system_prompt(:detect_language) do
+  defp one_shot_system_prompt(:detect_language, _language) do
     "Return JSON with exactly one key: language_code."
   end
 
-  defp one_shot_system_prompt(:analyze_taxonomy) do
+  defp one_shot_system_prompt(:analyze_taxonomy, _language) do
     "Return JSON with keys tags and categories, each an array of short strings."
   end
 
-  defp one_shot_system_prompt(:import_taxonomy_mapping) do
+  defp one_shot_system_prompt(:import_taxonomy_mapping, _language) do
     "You are helping import WordPress taxonomy into an existing blog. Return JSON with exactly two keys: categoryMappings and tagMappings. Each value must be an object mapping imported term names to existing project term names. Only map when the imported term should reuse an existing term to avoid duplicates. Do not invent target terms. Leave unmapped items out of the objects."
   end
 
-  defp one_shot_system_prompt(:analyze_post) do
+  defp one_shot_system_prompt(:analyze_post, nil) do
     "Return JSON with keys title, excerpt, and slug. Each value must be a single string (not an array or object)."
   end
 
-  defp one_shot_system_prompt(:translate_post) do
+  defp one_shot_system_prompt(:analyze_post, language) do
+    "Return JSON with keys title, excerpt, and slug. Each value must be a single string (not an array or object). Respond in #{language_name(language)}."
+  end
+
+  defp one_shot_system_prompt(:translate_post, _language) do
     "Return JSON with keys title, excerpt, and content. Preserve Markdown structure."
   end
 
-  defp one_shot_system_prompt(:analyze_image) do
+  defp one_shot_system_prompt(:analyze_image, nil) do
     "Return JSON with keys title, alt, and caption for the provided image."
   end
 
-  defp one_shot_system_prompt(:translate_media) do
+  defp one_shot_system_prompt(:analyze_image, language) do
+    "Return JSON with keys title, alt, and caption for the provided image. Respond in #{language_name(language)}."
+  end
+
+  defp one_shot_system_prompt(:translate_media, _language) do
     "Return JSON with keys title, alt, and caption translated to the requested language."
   end
 
-  defp one_shot_user_content(:detect_language, %{text: text}) do
+  defp one_shot_user_content(:detect_language, %{text: text}, _language) do
     "Detect the language of this text: #{text}"
   end
 
-  defp one_shot_user_content(:analyze_taxonomy, post) do
+  defp one_shot_user_content(:analyze_taxonomy, post, _language) do
     "Suggest categories and tags for the following post.\nTitle: #{post.title}\nExcerpt: #{post.excerpt}\nContent: #{truncate_text(post.content, 2000)}"
   end
 
-  defp one_shot_user_content(:import_taxonomy_mapping, payload) do
+  defp one_shot_user_content(:import_taxonomy_mapping, payload, _language) do
     [
       "Analyze these imported taxonomy terms and suggest which ones should map to existing project terms.",
       "",
@@ -266,15 +276,19 @@ defmodule BDS.AI.OneShot do
     |> Enum.join("\n")
   end
 
-  defp one_shot_user_content(:analyze_post, post) do
+  defp one_shot_user_content(:analyze_post, post, nil) do
     "Suggest an improved title, excerpt, and slug.\nTitle: #{post.title}\nExcerpt: #{post.excerpt}\nContent: #{truncate_text(post.content, 2000)}"
   end
 
-  defp one_shot_user_content(:translate_post, post) do
+  defp one_shot_user_content(:analyze_post, post, language) do
+    "Suggest an improved title, excerpt, and slug in #{language_name(language)}.\nTitle: #{post.title}\nExcerpt: #{post.excerpt}\nContent: #{truncate_text(post.content, 2000)}"
+  end
+
+  defp one_shot_user_content(:translate_post, post, _language) do
     "Translate this post to #{post.target_language}.\nTitle: #{post.title}\nExcerpt: #{post.excerpt}\nContent: #{post.content}"
   end
 
-  defp one_shot_user_content(:analyze_image, media) do
+  defp one_shot_user_content(:analyze_image, media, nil) do
     [
       %{
         "type" => "text",
@@ -284,10 +298,27 @@ defmodule BDS.AI.OneShot do
     ]
   end
 
-  defp one_shot_user_content(:translate_media, media) do
+  defp one_shot_user_content(:analyze_image, media, language) do
+    [
+      %{
+        "type" => "text",
+        "text" => "Analyze this image and return title, alt text, and caption in #{language_name(language)}."
+      },
+      %{"type" => "image_url", "image_url" => %{"url" => media.image_url}}
+    ]
+  end
+
+  defp one_shot_user_content(:translate_media, media, _language) do
     "Translate this media metadata to #{media.target_language}.\nTitle: #{media.title}\nAlt: #{media.alt}\nCaption: #{media.caption}"
   end
 
+  defp language_name("de"), do: "German"
+  defp language_name("en"), do: "English"
+  defp language_name("fr"), do: "French"
+  defp language_name("it"), do: "Italian"
+  defp language_name("es"), do: "Spanish"
+  defp language_name(language), do: String.capitalize(to_string(language))
+
   defp extract_json_response(%{json: json}) when is_map(json), do: {:ok, json}
 
   defp extract_json_response(%{content: content}) when is_binary(content) do
diff --git a/lib/bds/desktop/shell_live.ex b/lib/bds/desktop/shell_live.ex
index 95befb2..eec4b61 100644
--- a/lib/bds/desktop/shell_live.ex
+++ b/lib/bds/desktop/shell_live.ex
@@ -7,7 +7,7 @@ defmodule BDS.Desktop.ShellLive do
 
   import Phoenix.HTML
 
-  alias BDS.{AI, BoundedAtoms, ImportDefinitions, Media, Posts, Scripts}
+  alias BDS.{AI, BoundedAtoms, ImportDefinitions, Media, Metadata, Posts, Scripts}
   alias BDS.CliSync.Watcher
   alias BDS.Desktop.{FolderPicker, Overlay, ShellData, UILocale}
 
@@ -1565,13 +1565,14 @@ defmodule BDS.Desktop.ShellLive do
 
   defp spawn_ai_suggestions_task(socket) do
     current_tab = socket.assigns.current_tab
+    language = ai_suggestions_language(socket)
 
     case current_tab do
       %{type: :post, id: post_id} ->
         parent = self()
 
         Task.Supervisor.start_child(BDS.TCP.TaskSupervisor, fn ->
-          case AI.analyze_post(post_id) do
+          case AI.analyze_post(post_id, language: language) do
             {:ok, result} ->
               send(parent, {:ai_suggestions_result, :post, post_id, result})
 
@@ -1584,7 +1585,7 @@ defmodule BDS.Desktop.ShellLive do
         parent = self()
 
         Task.Supervisor.start_child(BDS.TCP.TaskSupervisor, fn ->
-          case AI.analyze_image(media_id) do
+          case AI.analyze_image(media_id, language: language) do
             {:ok, result} ->
               send(parent, {:ai_suggestions_result, :media, media_id, result})
 
@@ -1600,6 +1601,14 @@ defmodule BDS.Desktop.ShellLive do
     socket
   end
 
+  defp ai_suggestions_language(socket) do
+    active_project_id = socket.assigns.projects.active_project_id
+    {:ok, metadata} = Metadata.get_project_metadata(active_project_id)
+    metadata.main_language || "en"
+  rescue
+    _error -> "en"
+  end
+
   defp mac_ui? do
     case Application.get_env(:bds, :shell_platform) do
       nil -> match?({:unix, :darwin}, :os.type())
diff --git a/test/bds/ai_test.exs b/test/bds/ai_test.exs
index f56afdc..8bb0a4a 100644
--- a/test/bds/ai_test.exs
+++ b/test/bds/ai_test.exs
@@ -660,6 +660,44 @@ defmodule BDS.AITest do
     assert message =~ "# Draft body"
   end
 
+  test "analyze_post respects the language option and instructs the model to respond in that language" do
+    assert {:ok, _endpoint} =
+             BDS.AI.put_endpoint(
+               :online,
+               %{
+                 url: "https://api.example.test/v1",
+                 api_key: "online-secret",
+                 model: "gpt-4o-mini"
+               },
+               secret_backend: FakeSecretBackend
+             )
+
+    assert :ok = BDS.AI.set_airplane_mode(false)
+    assert :ok = BDS.AI.put_model_preference(:title, "gpt-4.1-mini")
+
+    assert {:ok, result} =
+             BDS.AI.analyze_post(
+               %{
+                 title: "Draft Post",
+                 excerpt: "Short summary",
+                 content: "# Draft body"
+               },
+               language: "de",
+               runtime: FakeRuntime,
+               test_pid: self(),
+               secret_backend: FakeSecretBackend
+             )
+
+    assert result.title =~ "Draft Post"
+
+    assert_received {:runtime_request, _endpoint, request}
+    assert request.operation == :analyze_post
+    system_message = get_in(request.messages, [Access.at(0), "content"]) || ""
+    user_message = get_in(request.messages, [Access.at(1), "content"]) || ""
+    assert system_message =~ "German"
+    assert user_message =~ "German"
+  end
+
   test "analyze_import_taxonomy uses the selected model override and returns only valid existing-term mappings" do
     assert {:ok, _endpoint} =
              BDS.AI.put_endpoint(
@@ -867,6 +905,54 @@ defmodule BDS.AITest do
     assert image_content["image_url"]["url"] =~ ~r/^data:image\/png;base64,/
   end
 
+  test "analyze_image respects the language option and instructs the model to respond in that language" do
+    assert {:ok, _endpoint} =
+             BDS.AI.put_endpoint(
+               :airplane,
+               %{
+                 url: "http://localhost:11434/v1",
+                 api_key: nil,
+                 model: "llama-default"
+               },
+               secret_backend: FakeSecretBackend
+             )
+
+    assert :ok = BDS.AI.set_airplane_mode(true)
+    assert :ok = BDS.AI.put_model_preference(:airplane_image_analysis, "llama3.2")
+
+    assert :ok =
+             BDS.AI.put_model_capabilities("llama3.2", %{
+               supports_attachment: true,
+               supports_tool_calls: false,
+               disables_reasoning: false
+             })
+
+    assert {:ok, analysis} =
+             BDS.AI.analyze_image(
+               %{
+                 mime_type: "image/png",
+                 title: "Source",
+                 alt: nil,
+                 caption: nil,
+                 image_url: "https://example.com/test.png"
+               },
+               language: "de",
+               runtime: FakeRuntime,
+               test_pid: self(),
+               secret_backend: FakeSecretBackend
+             )
+
+    assert analysis.title == "Sunset"
+
+    assert_received {:runtime_request, _endpoint, request}
+    assert request.operation == :analyze_image
+    system_message = get_in(request.messages, [Access.at(0), "content"]) || ""
+    user_message = Enum.at(request.messages, 1)
+    text_content = Enum.at(user_message["content"], 0)
+    assert system_message =~ "German"
+    assert text_content["text"] =~ "German"
+  end
+
   test "chat persists user, tool, and assistant messages with usage and blog stats prompt augmentation" do
     {:ok, project} = create_project_fixture("AI Chat")
     _fixtures = seed_project_content(project.id)
diff --git a/test/bds/desktop/shell_live_test.exs b/test/bds/desktop/shell_live_test.exs
index bdfe839..c86ee7c 100644
--- a/test/bds/desktop/shell_live_test.exs
+++ b/test/bds/desktop/shell_live_test.exs
@@ -2415,6 +2415,68 @@ defmodule BDS.Desktop.ShellLiveTest do
     refute html =~ "Loading"
   end
 
+  test "ai suggestions overlay sends project main language for posts", %{project: project} do
+    Application.put_env(:bds, :test_pid, self())
+
+    server =
+      start_supervised!({Bandit, plug: AiSuggestionsServer, port: 0, startup_log: false})
+
+    {:ok, {_address, port}} = ThousandIsland.listener_info(server)
+
+    assert :ok = AI.set_airplane_mode(false)
+
+    assert {:ok, _endpoint} =
+             AI.put_endpoint(:online, %{
+               url: "http://127.0.0.1:#{port}/v1",
+               api_key: "test-secret",
+               model: "gpt-test"
+             })
+
+    assert :ok = AI.put_model_preference(:title, "gpt-test")
+
+    assert {:ok, _metadata} = Metadata.update_project_metadata(project.id, %{main_language: "de"})
+
+    {:ok, post} =
+      Posts.create_post(%{
+        project_id: project.id,
+        title: "German Post",
+        content: "Some content for AI analysis"
+      })
+
+    {:ok, view, _html} = live_isolated(build_conn(), BDS.Desktop.ShellLive)
+
+    html =
+      render_click(view, "pin_sidebar_item", %{
+        "route" => "post",
+        "id" => post.id,
+        "title" => post.title,
+        "subtitle" => "draft"
+      })
+
+    assert html =~ ~s(data-testid="post-editor")
+
+    html =
+      view
+      |> element("[data-testid='post-editor'] .quick-actions-btn")
+      |> render_click()
+
+    assert html =~ "quick-actions-menu"
+
+    html =
+      view
+      |> element("[phx-click='open_overlay'][phx-value-kind='ai_suggestions']")
+      |> render_click()
+
+    assert html =~ "ai-suggestions-modal"
+
+    assert_receive {:ai_suggestions_request, request}, 2_000
+
+    system_message = get_in(request, ["messages", Access.at(0), "content"]) || ""
+    user_message = get_in(request, ["messages", Access.at(1), "content"]) || ""
+    assert system_message =~ "German"
+    assert user_message =~ "German"
+  end
+
   test "ai suggestions overlay is gated by offline mode for media", %{project: project} do
     assert :ok = AI.set_airplane_mode(true)
 
@@ -2532,6 +2594,77 @@ defmodule BDS.Desktop.ShellLiveTest do
     refute html =~ "Loading"
   end
 
+  test "ai suggestions overlay sends project main language for media", %{project: project} do
+    Application.put_env(:bds, :test_pid, self())
+
+    server =
+      start_supervised!({Bandit, plug: AiSuggestionsServer, port: 0, startup_log: false})
+
+    {:ok, {_address, port}} = ThousandIsland.listener_info(server)
+
+    assert :ok = AI.set_airplane_mode(false)
+
+    assert {:ok, _endpoint} =
+             AI.put_endpoint(:online, %{
+               url: "http://127.0.0.1:#{port}/v1",
+               api_key: "test-secret",
+               model: "gpt-test"
+             })
+
+    assert :ok = AI.put_model_preference(:image_analysis, "gpt-test")
+    assert :ok = AI.put_model_capabilities("gpt-test", %{supports_attachment: true})
+
+    assert {:ok, _metadata} = Metadata.update_project_metadata(project.id, %{main_language: "de"})
+
+    temp_dir =
+      Path.join(System.tmp_dir!(), "bds-shell-live-#{System.unique_integer([:positive])}")
+
+    File.mkdir_p!(temp_dir)
+    media_source_path = Path.join(temp_dir, "german-media.jpg")
+    File.write!(media_source_path, "fake image body")
+
+    {:ok, media} =
+      Media.import_media(%{
+        project_id: project.id,
+        source_path: media_source_path,
+        title: "German Media"
+      })
+
+    {:ok, view, _html} = live_isolated(build_conn(), BDS.Desktop.ShellLive)
+
+    html =
+      render_click(view, "pin_sidebar_item", %{
+        "route" => "media",
+        "id" => media.id,
+        "title" => media.title,
+        "subtitle" => "draft"
+      })
+
+    assert html =~ ~s(data-testid="media-editor")
+
+    html =
+      view
+      |> element("[data-testid='media-editor'] .quick-actions-btn")
+      |> render_click()
+
+    assert html =~ "quick-actions-menu"
+
+    html =
+      view
+      |> element("[phx-click='open_overlay'][phx-value-kind='ai_suggestions']")
+      |> render_click()
+
+    assert html =~ "ai-suggestions-modal"
+
+    assert_receive {:ai_suggestions_request, request}, 2_000
+
+    system_message = get_in(request, ["messages", Access.at(0), "content"]) || ""
+    user_message = Enum.at(request["messages"], 1)
+    text_content = Enum.at(user_message["content"], 0)
+    assert system_message =~ "German"
+    assert text_content["text"] =~ "German"
+  end
+
   test "ai suggestions async error closes overlay and shows toast", %{project: project} do
     Application.put_env(:bds, :test_pid, self())