diff --git a/src/yuzu/main.cpp b/src/yuzu/main.cpp
index e9d6e7421..422b3cff6 100644
--- a/src/yuzu/main.cpp
+++ b/src/yuzu/main.cpp
@@ -227,6 +227,8 @@ GMainWindow::GMainWindow()
     SetDiscordEnabled(UISettings::values.enable_discord_presence);
     discord_rpc->Update();
 
+    RegisterMetaTypes();
+
     InitializeWidgets();
     InitializeDebugWidgets();
     InitializeRecentFileMenuActions();
@@ -375,6 +377,55 @@ GMainWindow::~GMainWindow() {
         delete render_window;
 }
 
+void GMainWindow::RegisterMetaTypes() {
+    // Register integral and floating point types
+    qRegisterMetaType<u8>("u8");
+    qRegisterMetaType<u16>("u16");
+    qRegisterMetaType<u32>("u32");
+    qRegisterMetaType<u64>("u64");
+    qRegisterMetaType<u128>("u128");
+    qRegisterMetaType<s8>("s8");
+    qRegisterMetaType<s16>("s16");
+    qRegisterMetaType<s32>("s32");
+    qRegisterMetaType<s64>("s64");
+    qRegisterMetaType<f32>("f32");
+    qRegisterMetaType<f64>("f64");
+
+    // Register string types
+    qRegisterMetaType<std::string>("std::string");
+    qRegisterMetaType<std::wstring>("std::wstring");
+    qRegisterMetaType<std::u8string>("std::u8string");
+    qRegisterMetaType<std::u16string>("std::u16string");
+    qRegisterMetaType<std::u32string>("std::u32string");
+    qRegisterMetaType<std::string_view>("std::string_view");
+    qRegisterMetaType<std::wstring_view>("std::wstring_view");
+    qRegisterMetaType<std::u8string_view>("std::u8string_view");
+    qRegisterMetaType<std::u16string_view>("std::u16string_view");
+    qRegisterMetaType<std::u32string_view>("std::u32string_view");
+
+    // Register applet types
+
+    // Controller Applet
+    qRegisterMetaType<Core::Frontend::ControllerParameters>("Core::Frontend::ControllerParameters");
+
+    // Software Keyboard Applet
+    qRegisterMetaType<Core::Frontend::KeyboardInitializeParameters>(
+        "Core::Frontend::KeyboardInitializeParameters");
+    qRegisterMetaType<Core::Frontend::InlineAppearParameters>(
+        "Core::Frontend::InlineAppearParameters");
+    qRegisterMetaType<Core::Frontend::InlineTextParameters>("Core::Frontend::InlineTextParameters");
+    qRegisterMetaType<Service::AM::Applets::SwkbdResult>("Service::AM::Applets::SwkbdResult");
+    qRegisterMetaType<Service::AM::Applets::SwkbdTextCheckResult>(
+        "Service::AM::Applets::SwkbdTextCheckResult");
+    qRegisterMetaType<Service::AM::Applets::SwkbdReplyType>("Service::AM::Applets::SwkbdReplyType");
+
+    // Web Browser Applet
+    qRegisterMetaType<Service::AM::Applets::WebExitReason>("Service::AM::Applets::WebExitReason");
+
+    // Register loader types
+    qRegisterMetaType<Core::System::ResultStatus>("Core::System::ResultStatus");
+}
+
 void GMainWindow::ControllerSelectorReconfigureControllers(
     const Core::Frontend::ControllerParameters& parameters) {
     QtControllerSelectorDialog dialog(this, parameters, input_subsystem.get());
@@ -2166,13 +2217,6 @@ void GMainWindow::OnStartGame() {
 
     emu_thread->SetRunning(true);
 
-    qRegisterMetaType<Core::Frontend::ControllerParameters>("Core::Frontend::ControllerParameters");
-    qRegisterMetaType<Core::System::ResultStatus>("Core::System::ResultStatus");
-    qRegisterMetaType<std::string>("std::string");
-    qRegisterMetaType<std::optional<std::u16string>>("std::optional<std::u16string>");
-    qRegisterMetaType<std::string_view>("std::string_view");
-    qRegisterMetaType<Service::AM::Applets::WebExitReason>("Service::AM::Applets::WebExitReason");
-
     connect(emu_thread.get(), &EmuThread::ErrorThrown, this, &GMainWindow::OnCoreError);
 
     ui.action_Start->setEnabled(false);
diff --git a/src/yuzu/main.h b/src/yuzu/main.h
index 6429549ae..d8849f85b 100644
--- a/src/yuzu/main.h
+++ b/src/yuzu/main.h
@@ -37,9 +37,13 @@ enum class GameListRemoveTarget;
 enum class InstalledEntryType;
 class GameListPlaceholder;
 
+class QtSoftwareKeyboardDialog;
+
 namespace Core::Frontend {
 struct ControllerParameters;
-struct SoftwareKeyboardParameters;
+struct InlineAppearParameters;
+struct InlineTextParameters;
+struct KeyboardInitializeParameters;
 } // namespace Core::Frontend
 
 namespace DiscordRPC {
@@ -57,8 +61,11 @@ class InputSubsystem;
 }
 
 namespace Service::AM::Applets {
+enum class SwkbdResult : u32;
+enum class SwkbdTextCheckResult : u32;
+enum class SwkbdReplyType : u32;
 enum class WebExitReason : u32;
-}
+} // namespace Service::AM::Applets
 
 enum class EmulatedDirectoryTarget {
     NAND,
@@ -143,6 +150,8 @@ public slots:
     void OnAppFocusStateChanged(Qt::ApplicationState state);
 
 private:
+    void RegisterMetaTypes();
+
     void InitializeWidgets();
     void InitializeDebugWidgets();
     void InitializeRecentFileMenuActions();
@@ -329,6 +338,9 @@ private:
     // Disables the web applet for the rest of the emulated session
     bool disable_web_applet{};
 
+    // Applets
+    QtSoftwareKeyboardDialog* software_keyboard = nullptr;
+
 protected:
     void dropEvent(QDropEvent* event) override;
     void dragEnterEvent(QDragEnterEvent* event) override;