diff --git a/Telegram/Resources/langs/lang.strings b/Telegram/Resources/langs/lang.strings
index cdef1a3b23..931ea862bd 100644
--- a/Telegram/Resources/langs/lang.strings
+++ b/Telegram/Resources/langs/lang.strings
@@ -6774,6 +6774,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_language_not_ready_link" = "translation platform";
 
 "lng_translate_box_error" = "Translate failed.";
+"lng_translate_box_error_language_pack_not_installed" = "Translation requires a local language pack. Download it in System Settings.";
 
 "lng_translate_settings_subtitle" = "Translate Messages";
 "lng_translate_settings_show" = "Show Translate Button";
diff --git a/Telegram/SourceFiles/boxes/translate_box.cpp b/Telegram/SourceFiles/boxes/translate_box.cpp
index d07a87f74a..e91a5f4956 100644
--- a/Telegram/SourceFiles/boxes/translate_box.cpp
+++ b/Telegram/SourceFiles/boxes/translate_box.cpp
@@ -64,8 +64,25 @@ void TranslateBox(
 				state->to.current(),
 				crl::guard(box, [=](LanguageId id) { state->to = id; })));
 		},
-		.request = [=](LanguageId to, Fn<void(std::optional<TextWithEntities>)> done) {
-			state->provider->request(*request, to, std::move(done));
+		.request = [=](
+				LanguageId to,
+				Fn<void(TranslateBoxContentResult)> done) {
+			state->provider->request(
+				*request,
+				to,
+				[done = std::move(done)](TranslateProviderResult result) {
+					using ProviderError = TranslateProviderError;
+					using UiError = TranslateBoxContentError;
+					done(TranslateBoxContentResult{
+						.text = std::move(result.text),
+						.error = (result.error
+								== ProviderError::LocalLanguagePackMissing)
+							? UiError::LocalLanguagePackMissing
+							: (result.error == ProviderError::None)
+							? UiError::None
+							: UiError::Unknown,
+					});
+				});
 		},
 	});
 }
diff --git a/Telegram/SourceFiles/boxes/translate_box_content.cpp b/Telegram/SourceFiles/boxes/translate_box_content.cpp
index c467ad759c..daf204eee3 100644
--- a/Telegram/SourceFiles/boxes/translate_box_content.cpp
+++ b/Telegram/SourceFiles/boxes/translate_box_content.cpp
@@ -86,7 +86,7 @@ void TranslateBoxContent(
 	const auto textContext = std::move(args.textContext);
 	const auto chooseTo = std::make_shared<Fn<void()>>(std::move(args.chooseTo));
 	const auto request = std::make_shared<
-		Fn<void(LanguageId, Fn<void(std::optional<TextWithEntities>)>)>>(
+		Fn<void(LanguageId, Fn<void(TranslateBoxContentResult)>)>>(
 			std::move(args.request));
 
 	auto to = std::move(args.to) | rpl::start_spawning(box->lifetime());
@@ -181,9 +181,12 @@ void TranslateBoxContent(
 	};
 	const auto state = box->lifetime().make_state<State>();
 
-	const auto showText = [=](std::optional<TextWithEntities> translatedText) {
-		auto value = translatedText.value_or(
-			tr::italic(tr::lng_translate_box_error(tr::now)));
+	const auto showText = [=](TranslateBoxContentResult result) {
+		using UiError = TranslateBoxContentError;
+		auto value = result.text.value_or(
+			tr::italic(((result.error == UiError::LocalLanguagePackMissing)
+				? tr::lng_translate_box_error_language_pack_not_installed
+				: tr::lng_translate_box_error)(tr::now)));
 		translated->entity()->setMarkedText(value, textContext);
 		translated->show(anim::type::instant);
 		loading->hide(anim::type::instant);
@@ -192,11 +195,11 @@ void TranslateBoxContent(
 		const auto requestId = ++state->requestId;
 		loading->show(anim::type::instant);
 		translated->hide(anim::type::instant);
-		(*request)(id, [=](std::optional<TextWithEntities> translatedText) {
+		(*request)(id, [=](TranslateBoxContentResult result) {
 			if (state->requestId != requestId) {
 				return;
 			}
-			showText(std::move(translatedText));
+			showText(std::move(result));
 		});
 	};
 	std::move(to) | rpl::on_next(send, box->lifetime());
diff --git a/Telegram/SourceFiles/boxes/translate_box_content.h b/Telegram/SourceFiles/boxes/translate_box_content.h
index e2d982bd8b..38e68804b7 100644
--- a/Telegram/SourceFiles/boxes/translate_box_content.h
+++ b/Telegram/SourceFiles/boxes/translate_box_content.h
@@ -15,6 +15,17 @@ struct MarkedContext;
 
 namespace Ui {
 
+enum class TranslateBoxContentError {
+	None = 0,
+	Unknown,
+	LocalLanguagePackMissing,
+};
+
+struct TranslateBoxContentResult {
+	std::optional<TextWithEntities> text;
+	TranslateBoxContentError error = TranslateBoxContentError::None;
+};
+
 class GenericBox;
 
 struct TranslateBoxContentArgs {
@@ -23,7 +34,7 @@ struct TranslateBoxContentArgs {
 	Text::MarkedContext textContext;
 	rpl::producer<LanguageId> to;
 	Fn<void()> chooseTo;
-	Fn<void(LanguageId, Fn<void(std::optional<TextWithEntities>)>)> request;
+	Fn<void(LanguageId, Fn<void(TranslateBoxContentResult)>)> request;
 };
 
 void TranslateBoxContent(
diff --git a/Telegram/SourceFiles/lang/translate_mtproto_provider.cpp b/Telegram/SourceFiles/lang/translate_mtproto_provider.cpp
index eab649f289..1c487411df 100644
--- a/Telegram/SourceFiles/lang/translate_mtproto_provider.cpp
+++ b/Telegram/SourceFiles/lang/translate_mtproto_provider.cpp
@@ -28,7 +28,7 @@ public:
 	void request(
 			TranslateProviderRequest request,
 			LanguageId to,
-			Fn<void(std::optional<TextWithEntities>)> done) override {
+			Fn<void(TranslateProviderResult)> done) override {
 		using Flag = MTPmessages_TranslateText::Flag;
 		const auto flags = request.msgId
 			? (Flag::f_peer | Flag::f_id)
@@ -36,7 +36,9 @@ public:
 			? Flag::f_text
 			: Flag(0);
 		if (!flags) {
-			done(std::nullopt);
+			done(TranslateProviderResult{
+				.error = TranslateProviderError::Unknown,
+			});
 			return;
 		}
 		_api.request(MTPmessages_TranslateText(
@@ -58,12 +60,18 @@ public:
 			const auto &data = result.data();
 			const auto &list = data.vresult().v;
 			done(list.isEmpty()
-				? std::optional<TextWithEntities>()
-				: std::optional<TextWithEntities>(Api::ParseTextWithEntities(
-					&request.peer->session(),
-					list.front())));
+				? TranslateProviderResult{
+					.error = TranslateProviderError::Unknown,
+				}
+				: TranslateProviderResult{
+					.text = Api::ParseTextWithEntities(
+						&request.peer->session(),
+						list.front()),
+				});
 		}).fail([=](const MTP::Error &) {
-			done(std::nullopt);
+			done(TranslateProviderResult{
+				.error = TranslateProviderError::Unknown,
+			});
 		}).send();
 	}
 
diff --git a/Telegram/SourceFiles/platform/mac/translate_provider_mac.mm b/Telegram/SourceFiles/platform/mac/translate_provider_mac.mm
index d5717d2e03..7e9f7f779a 100644
--- a/Telegram/SourceFiles/platform/mac/translate_provider_mac.mm
+++ b/Telegram/SourceFiles/platform/mac/translate_provider_mac.mm
@@ -17,6 +17,13 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 namespace Platform {
 namespace {
 
+[[nodiscard]] Ui::TranslateProviderError ParseErrorCode(
+		const char *errorUtf8) {
+	return !std::strcmp(errorUtf8, "local-language-pack-missing")
+		? Ui::TranslateProviderError::LocalLanguagePackMissing
+		: Ui::TranslateProviderError::Unknown;
+}
+
 class TranslateProvider final : public Ui::TranslateProvider
 , public base::has_weak_ptr {
 public:
@@ -27,20 +34,24 @@ public:
 	void request(
 			Ui::TranslateProviderRequest request,
 			LanguageId to,
-			Fn<void(std::optional<TextWithEntities>)> done) override {
+			Fn<void(Ui::TranslateProviderResult)> done) override {
 		if (request.text.text.isEmpty()) {
-			done(std::nullopt);
+			done(Ui::TranslateProviderResult{
+				.error = Ui::TranslateProviderError::Unknown,
+			});
 			return;
 		}
 		const auto text = request.text.text.toUtf8();
 		const auto target = to.twoLetterCode().toUtf8();
 		if (target.isEmpty()) {
-			done(std::nullopt);
+			done(Ui::TranslateProviderResult{
+				.error = Ui::TranslateProviderError::Unknown,
+			});
 			return;
 		}
 		struct CallbackContext {
 			base::weak_ptr<TranslateProvider> provider;
-			Fn<void(std::optional<TextWithEntities>)> done;
+			Fn<void(Ui::TranslateProviderResult)> done;
 		};
 		auto ownedContext = std::make_unique<CallbackContext>(CallbackContext{
 			.provider = base::make_weak(this),
@@ -55,27 +66,26 @@ public:
 					static_cast<CallbackContext*>(context));
 				auto done = std::move(guard->done);
 				const auto isAlive = (guard->provider.get() != nullptr);
-				auto translatedText = QString();
-				auto hasError = (resultUtf8 == nullptr);
+				auto result = Ui::TranslateProviderResult();
 				if (resultUtf8 != nullptr) {
-					translatedText = QString::fromUtf8(resultUtf8);
+					result.text = TextWithEntities{
+						.text = QString::fromUtf8(resultUtf8),
+					};
 					std::free(const_cast<char*>(resultUtf8));
 				}
 				if (errorUtf8 != nullptr) {
-					hasError = true;
+					result.error = ParseErrorCode(errorUtf8);
 					std::free(const_cast<char*>(errorUtf8));
+				} else if (!result.text.has_value()) {
+					result.error = Ui::TranslateProviderError::Unknown;
 				}
 				if (!isAlive) {
 					return;
 				}
 				crl::on_main([=,
 						done = std::move(done),
-						translatedText = std::move(translatedText)] {
-					done(hasError
-						? std::optional<TextWithEntities>()
-						: std::optional<TextWithEntities>(TextWithEntities{
-							.text = std::move(translatedText),
-						}));
+						result = std::move(result)] {
+					done(std::move(result));
 				});
 			});
 	}
diff --git a/Telegram/lib_translate b/Telegram/lib_translate
index 48d9e3ca92..ed5bbec209 160000
--- a/Telegram/lib_translate
+++ b/Telegram/lib_translate
@@ -1 +1 @@
-Subproject commit 48d9e3ca92fbee00d636ace5a2c71f9972b5ac27
+Subproject commit ed5bbec209451bd56237783e783fdadfb3c1fdd2