diff --git a/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioControls/RealSpinBox.qml b/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioControls/RealSpinBox.qml
index 9072a2de8ae..c83be5bd2b4 100644
--- a/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioControls/RealSpinBox.qml
+++ b/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioControls/RealSpinBox.qml
@@ -4,6 +4,7 @@
 import QtQuick
 import QtQuick.Templates as T
 import StudioTheme 1.0 as StudioTheme
+import StudioQuickUtils
 
 T.SpinBox {
     id: control
@@ -71,6 +72,8 @@ T.SpinBox {
     signal dragging
     signal indicatorPressed
 
+    locale: Utils.locale
+
     // Use custom wheel handling due to bugs
     property bool __wheelEnabled: false
     wheelEnabled: false
diff --git a/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioControls/SpinBox.qml b/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioControls/SpinBox.qml
index ffde6e4ad16..8a07e4bc478 100644
--- a/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioControls/SpinBox.qml
+++ b/share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/StudioControls/SpinBox.qml
@@ -4,6 +4,7 @@
 import QtQuick
 import QtQuick.Templates as T
 import StudioTheme 1.0 as StudioTheme
+import StudioQuickUtils
 
 T.SpinBox {
     id: control
@@ -54,6 +55,8 @@ T.SpinBox {
     signal dragEnded
     signal dragging
 
+    locale: Utils.locale
+
     // Use custom wheel handling due to bugs
     property bool __wheelEnabled: false
     wheelEnabled: false
diff --git a/src/plugins/qmldesigner/qmldesignerplugin.cpp b/src/plugins/qmldesigner/qmldesignerplugin.cpp
index 68d3c7071f8..a158ba43098 100644
--- a/src/plugins/qmldesigner/qmldesignerplugin.cpp
+++ b/src/plugins/qmldesigner/qmldesignerplugin.cpp
@@ -27,7 +27,6 @@
 #include <formeditor/transitiontool.h>
 #include <formeditor/view3dtool.h>
 #include <studioquickwidget.h>
-#include <windowmanager.h>
 #ifndef QDS_USE_PROJECTSTORAGE
 #  include <metainfo.h>
 #endif
@@ -311,7 +310,6 @@ bool QmlDesignerPlugin::initialize(const QStringList & /*arguments*/, QString *e
     //TODO Move registering those types out of the property editor, since they are used also in the states editor
     Quick2PropertyEditorView::registerQmlTypes();
     StudioQuickWidget::registerDeclarativeType();
-    QmlDesignerBase::WindowManager::registerDeclarativeType();
 
     Exception::setWarnAboutException(!QmlDesignerPlugin::instance()
                                           ->settings()
diff --git a/src/plugins/qmldesignerbase/CMakeLists.txt b/src/plugins/qmldesignerbase/CMakeLists.txt
index 2cee711a35c..4fe7d952f70 100644
--- a/src/plugins/qmldesignerbase/CMakeLists.txt
+++ b/src/plugins/qmldesignerbase/CMakeLists.txt
@@ -45,6 +45,7 @@ extend_qtc_plugin(QmlDesignerBase
   PUBLIC_INCLUDES studio
   SOURCES_PREFIX studio
   SOURCES
+    studioquickutils.cpp studioquickutils.h
     studiostyle.cpp studiostyle.h
     studiostyle_p.cpp studiostyle_p.h
     studioquickwidget.cpp studioquickwidget.h
diff --git a/src/plugins/qmldesignerbase/qmldesignerbaseplugin.cpp b/src/plugins/qmldesignerbase/qmldesignerbaseplugin.cpp
index ec3b47063a2..626fa9f17df 100644
--- a/src/plugins/qmldesignerbase/qmldesignerbaseplugin.cpp
+++ b/src/plugins/qmldesignerbase/qmldesignerbaseplugin.cpp
@@ -8,6 +8,8 @@
 #include "studio/studiostyle.h"
 
 #include <designersettings.h>
+#include <studioquickutils.h>
+#include <windowmanager.h>
 
 #include <coreplugin/icore.h>
 #include <utils/appinfo.h>
@@ -89,6 +91,9 @@ bool QmlDesignerBasePlugin::initialize(const QStringList &arguments, QString *)
     if (arguments.contains("-qml-lite-designer"))
         enbableLiteMode();
 
+    WindowManager::registerDeclarativeType();
+    StudioQuickUtils::registerDeclarativeType();
+
     d = std::make_unique<Data>();
     if (Core::ICore::settings()->value("QML/Designer/StandAloneMode", false).toBool())
         d->studioConfigSettingsPage = std::make_unique<StudioConfigSettingsPage>();
diff --git a/src/plugins/qmldesignerbase/studio/studioquickutils.cpp b/src/plugins/qmldesignerbase/studio/studioquickutils.cpp
new file mode 100644
index 00000000000..11af253732d
--- /dev/null
+++ b/src/plugins/qmldesignerbase/studio/studioquickutils.cpp
@@ -0,0 +1,31 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include "studioquickutils.h"
+
+#include <coreplugin/icore.h>
+
+namespace QmlDesigner {
+
+StudioQuickUtils::StudioQuickUtils()
+{
+    m_locale = QLocale("DesignStudioLocale");
+    m_locale.setNumberOptions(QLocale::OmitGroupSeparator);
+}
+
+void StudioQuickUtils::registerDeclarativeType()
+{
+    qmlRegisterSingletonType<StudioQuickUtils>(
+        "StudioQuickUtils", 1, 0, "Utils", [](QQmlEngine *, QJSEngine *) {
+            return new StudioQuickUtils();
+        });
+}
+
+const QLocale &StudioQuickUtils::locale() const
+{
+    return m_locale;
+}
+
+StudioQuickUtils::~StudioQuickUtils() {}
+
+} // namespace QmlDesigner
diff --git a/src/plugins/qmldesignerbase/studio/studioquickutils.h b/src/plugins/qmldesignerbase/studio/studioquickutils.h
new file mode 100644
index 00000000000..b7f298cebf1
--- /dev/null
+++ b/src/plugins/qmldesignerbase/studio/studioquickutils.h
@@ -0,0 +1,39 @@
+// Copyright (C) 2024 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#pragma once
+
+#include "../qmldesignerbase_global.h"
+
+#include <QtQml/qqml.h>
+
+#include <QLocale>
+
+namespace QmlDesigner {
+
+class QMLDESIGNERBASE_EXPORT StudioQuickUtils : public QObject
+{
+    Q_OBJECT
+
+    Q_PROPERTY(QLocale locale READ locale NOTIFY localeChanged)
+
+public:
+    ~StudioQuickUtils();
+
+    StudioQuickUtils(const StudioQuickUtils &) = delete;
+    void operator=(const StudioQuickUtils &) = delete;
+
+    static void registerDeclarativeType();
+
+    const QLocale &locale() const;
+
+signals:
+    void localeChanged();
+
+private:
+    StudioQuickUtils();
+
+    QLocale m_locale;
+};
+
+} // namespace QmlDesigner
diff --git a/src/plugins/qmldesignerbase/utils/windowmanager.cpp b/src/plugins/qmldesignerbase/utils/windowmanager.cpp
index aa0b0772f9e..e00a19fb6d9 100644
--- a/src/plugins/qmldesignerbase/utils/windowmanager.cpp
+++ b/src/plugins/qmldesignerbase/utils/windowmanager.cpp
@@ -11,9 +11,7 @@
 #include <QScreen>
 #include <QWindow>
 
-namespace QmlDesignerBase {
-
-QPointer<WindowManager> WindowManager::m_instance = nullptr;
+namespace QmlDesigner {
 
 WindowManager::WindowManager()
 {
@@ -56,4 +54,4 @@ QRect WindowManager::getScreenGeometry(QPoint point)
     return screen->geometry();
 }
 
-} // namespace QmlDesignerBase
+} // namespace QmlDesigner
diff --git a/src/plugins/qmldesignerbase/utils/windowmanager.h b/src/plugins/qmldesignerbase/utils/windowmanager.h
index 87a0b701463..01444ce43dc 100644
--- a/src/plugins/qmldesignerbase/utils/windowmanager.h
+++ b/src/plugins/qmldesignerbase/utils/windowmanager.h
@@ -10,7 +10,7 @@
 
 QT_FORWARD_DECLARE_CLASS(QWindow)
 
-namespace QmlDesignerBase {
+namespace QmlDesigner {
 
 class QMLDESIGNERBASE_EXPORT WindowManager : public QObject
 {
@@ -34,8 +34,6 @@ signals:
 
 private:
     WindowManager();
-
-    static QPointer<WindowManager> m_instance;
 };
 
-} // namespace QmlDesignerBase
+} // namespace QmlDesigner