diff --git a/rbutil/rbutilqt/configure.cpp b/rbutil/rbutilqt/configure.cpp
index 5fba3010c0..d2ce59eff8 100644
--- a/rbutil/rbutilqt/configure.cpp
+++ b/rbutil/rbutilqt/configure.cpp
@@ -230,7 +230,7 @@ void Config::updateCacheInfo(QString path)
         sz += fs.at(i).size();
         qDebug() << fs.at(i).fileName() << fs.at(i).size();
     }
-    ui.cacheSize->setText(tr("Current cache size is %1 kiB.")
+    ui.cacheSize->setText(tr("Current cache size is %L1 kiB.")
             .arg(sz/1024));
 }
 
diff --git a/rbutil/rbutilqt/installthemes.cpp b/rbutil/rbutilqt/installthemes.cpp
index cf04280654..b468dad189 100644
--- a/rbutil/rbutilqt/installthemes.cpp
+++ b/rbutil/rbutilqt/installthemes.cpp
@@ -168,7 +168,7 @@ void ThemesInstallWindow::updateDetails(int row)
     size += iniDetails.value("size").toInt();
     qDebug() << ui.listThemes->item(row)->data(Qt::UserRole).toString() << size;
     iniDetails.endGroup();
-    ui.labelSize->setText(tr("Download size %1 kiB").arg(size));
+    ui.labelSize->setText(tr("Download size %L1 kiB").arg(size));
 
     iniDetails.beginGroup(ui.listThemes->item(row)->data(Qt::UserRole).toString());
 
diff --git a/rbutil/rbutilqt/main.cpp b/rbutil/rbutilqt/main.cpp
index a246f6ab27..4928c51d89 100644
--- a/rbutil/rbutilqt/main.cpp
+++ b/rbutil/rbutilqt/main.cpp
@@ -42,6 +42,7 @@ int main( int argc, char ** argv ) {
     if(!user->value("lang", "").toString().isEmpty()) {
         if(!translator.load("rbutil_" + user->value("lang").toString(), absolutePath))
             translator.load("rbutil_" + user->value("lang").toString(), ":/lang");
+        QLocale::setDefault(user->value("lang").toString());
     }
     delete user;
     app.installTranslator(&translator);