Fix language selection in Designer, Linguist and Assistant

Previous way of loading translation didn't use the proper
QTranslator::load() overload. Because of that, the name of the locale
was used which may be different than user's preferred display language.

See also https://codereview.qt-project.org/c/qt/qtdoc/+/297560

Change-Id: Icbb5d4c94c2d627e521005dcd90a1a0de495c63c
Reviewed-by: Kai Koehne <kai.koehne@qt.io>

1 files changed, 2 insertions, 3 deletions

diff --git a/src/designer/src/designer/qdesigner.cpp b/src/designer/src/designer/qdesigner.cpp
index 75ab2b01b..164a7a1a8 100644
--- a/src/designer/src/designer/qdesigner.cpp
+++ b/src/designer/src/designer/qdesigner.cpp
@@ -239,12 +239,11 @@ QDesigner::ParseArgumentsResult QDesigner::parseCommandLineArguments()
     if (options.enableInternalDynamicProperties)
         QDesignerPropertySheet::setInternalDynamicPropertiesEnabled(true);
 
-    const QString localSysName = QLocale::system().name();
     QScopedPointer<QTranslator> designerTranslator(new QTranslator(this));
-    if (designerTranslator->load(QStringLiteral("designer_") + localSysName, options.resourceDir)) {
+    if (designerTranslator->load(QLocale(), QStringLiteral("designer"), QStringLiteral("_"), options.resourceDir)) {
         installTranslator(designerTranslator.take());
         QScopedPointer<QTranslator> qtTranslator(new QTranslator(this));
-        if (qtTranslator->load(QStringLiteral("qt_") + localSysName, options.resourceDir))
+        if (qtTranslator->load(QLocale(), QStringLiteral("qt"), QStringLiteral("_"), options.resourceDir))
             installTranslator(qtTranslator.take());
     }