diff --git a/Flow.Launcher.Core/Resource/Internationalization.cs b/Flow.Launcher.Core/Resource/Internationalization.cs
index 4568e92f3..acc693ed5 100644
--- a/Flow.Launcher.Core/Resource/Internationalization.cs
+++ b/Flow.Launcher.Core/Resource/Internationalization.cs
@@ -96,9 +96,16 @@ namespace Flow.Launcher.Core.Resource
             {
                 LoadLanguage(language);
             }
-            Settings.Language = language.LanguageCode;
-            CultureInfo.CurrentCulture = new CultureInfo(language.LanguageCode);
+            // Culture of this thread
+            // Use CreateSpecificCulture to preserve possible user-override settings in Windows
+            CultureInfo.CurrentCulture = CultureInfo.CreateSpecificCulture(language.LanguageCode);
             CultureInfo.CurrentUICulture = CultureInfo.CurrentCulture;
+            // App domain
+            CultureInfo.DefaultThreadCurrentCulture = CultureInfo.CreateSpecificCulture(language.LanguageCode);
+            CultureInfo.DefaultThreadCurrentUICulture = CultureInfo.DefaultThreadCurrentCulture;
+
+            // Raise event after culture is set
+            Settings.Language = language.LanguageCode;
             _ = Task.Run(() =>
             {
                 UpdatePluginMetadataTranslations();
@@ -186,7 +193,7 @@ namespace Flow.Launcher.Core.Resource
                 {
                     p.Metadata.Name = pluginI18N.GetTranslatedPluginTitle();
                     p.Metadata.Description = pluginI18N.GetTranslatedPluginDescription();
-                    pluginI18N.OnCultureInfoChanged(CultureInfo.CurrentCulture);
+                    pluginI18N.OnCultureInfoChanged(CultureInfo.DefaultThreadCurrentCulture);
                 }
                 catch (Exception e)
                 {
diff --git a/Flow.Launcher.Infrastructure/UserSettings/Settings.cs b/Flow.Launcher.Infrastructure/UserSettings/Settings.cs
index 33072b53d..3561c6ffe 100644
--- a/Flow.Launcher.Infrastructure/UserSettings/Settings.cs
+++ b/Flow.Launcher.Infrastructure/UserSettings/Settings.cs
@@ -6,7 +6,6 @@ using System.Text.Json.Serialization;
 using System.Windows;
 using Flow.Launcher.Plugin;
 using Flow.Launcher.Plugin.SharedModels;
-using Flow.Launcher;
 using Flow.Launcher.ViewModel;
 
 namespace Flow.Launcher.Infrastructure.UserSettings
diff --git a/Flow.Launcher/Converters/QuerySuggestionBoxConverter.cs b/Flow.Launcher/Converters/QuerySuggestionBoxConverter.cs
index ecdfc5851..1e39473e0 100644
--- a/Flow.Launcher/Converters/QuerySuggestionBoxConverter.cs
+++ b/Flow.Launcher/Converters/QuerySuggestionBoxConverter.cs
@@ -52,7 +52,8 @@ namespace Flow.Launcher.Converters
 
                 // Check if Text will be larger then our QueryTextBox
                 System.Windows.Media.Typeface typeface = new Typeface(QueryTextBox.FontFamily, QueryTextBox.FontStyle, QueryTextBox.FontWeight, QueryTextBox.FontStretch);
-                System.Windows.Media.FormattedText ft = new FormattedText(QueryTextBox.Text, System.Globalization.CultureInfo.CurrentCulture, System.Windows.FlowDirection.LeftToRight, typeface, QueryTextBox.FontSize, Brushes.Black);
+                // TODO: Obsolete warning?
+                System.Windows.Media.FormattedText ft = new FormattedText(QueryTextBox.Text, System.Globalization.CultureInfo.DefaultThreadCurrentCulture, System.Windows.FlowDirection.LeftToRight, typeface, QueryTextBox.FontSize, Brushes.Black);
 
                 var offset = QueryTextBox.Padding.Right;
 
@@ -75,4 +76,4 @@ namespace Flow.Launcher.Converters
             throw new NotImplementedException();
         }
     }
-}
\ No newline at end of file
+}
diff --git a/Flow.Launcher/ViewModel/MainViewModel.cs b/Flow.Launcher/ViewModel/MainViewModel.cs
index 29aef88fd..4db8e3df3 100644
--- a/Flow.Launcher/ViewModel/MainViewModel.cs
+++ b/Flow.Launcher/ViewModel/MainViewModel.cs
@@ -65,9 +65,10 @@ namespace Flow.Launcher.ViewModel
             Settings = settings;
             Settings.PropertyChanged += (_, args) =>
             {
-                if (args.PropertyName == nameof(Settings.WindowSize))
-                {
-                    OnPropertyChanged(nameof(MainWindowWidth));
+                switch (args.PropertyName) {
+                    case nameof(Settings.WindowSize):
+                        OnPropertyChanged(nameof(MainWindowWidth));
+                        break;
                 }
             };
 
@@ -334,8 +335,8 @@ namespace Flow.Launcher.ViewModel
         public Settings Settings { get; }
         public string ClockText { get; private set; }
         public string DateText { get; private set; }
+        public CultureInfo Culture => CultureInfo.DefaultThreadCurrentCulture;
 
-        public CultureInfo cultureInfo => new CultureInfo(Settings.Language);
         private async Task RegisterClockAndDateUpdateAsync()
         {
             var timer = new PeriodicTimer(TimeSpan.FromSeconds(1));
@@ -343,11 +344,12 @@ namespace Flow.Launcher.ViewModel
             while (await timer.WaitForNextTickAsync().ConfigureAwait(false))
             {
                 if (Settings.UseClock)
-                    ClockText = DateTime.Now.ToString(Settings.TimeFormat, cultureInfo);
+                    ClockText = DateTime.Now.ToString(Settings.TimeFormat, Culture);
                 if (Settings.UseDate)
-                    DateText = DateTime.Now.ToString(Settings.DateFormat, cultureInfo);
+                    DateText = DateTime.Now.ToString(Settings.DateFormat, Culture);
             }
         }
+
         public ResultsViewModel Results { get; private set; }
 
         public ResultsViewModel ContextMenu { get; private set; }
diff --git a/Flow.Launcher/ViewModel/SettingWindowViewModel.cs b/Flow.Launcher/ViewModel/SettingWindowViewModel.cs
index 0c25dcc85..d9e9a3469 100644
--- a/Flow.Launcher/ViewModel/SettingWindowViewModel.cs
+++ b/Flow.Launcher/ViewModel/SettingWindowViewModel.cs
@@ -61,6 +61,7 @@ namespace Flow.Launcher.ViewModel
                         break;
                 }
             };
+
         }
 
         public Settings Settings { get; set; }
@@ -84,7 +85,7 @@ namespace Flow.Launcher.ViewModel
             }
         }
 
-        public CultureInfo cultureInfo => new CultureInfo(Settings.Language);
+        public CultureInfo Culture => CultureInfo.DefaultThreadCurrentCulture;
 
         public bool StartFlowLauncherOnSystemStartup
         {
@@ -496,20 +497,19 @@ namespace Flow.Launcher.ViewModel
 
         public string TimeFormat
         {
-            get { return Settings.TimeFormat; }
-            set { Settings.TimeFormat = value; }
+            get => Settings.TimeFormat;
+            set => Settings.TimeFormat = value;
         }
 
         public string DateFormat
         {
-            get { return Settings.DateFormat; }
-            set { Settings.DateFormat = value; }
+            get => Settings.DateFormat;
+            set => Settings.DateFormat = value;
         }
 
-        public string ClockText => DateTime.Now.ToString(TimeFormat, cultureInfo);
-
-        public string DateText => DateTime.Now.ToString(DateFormat, cultureInfo);
+        public string ClockText => DateTime.Now.ToString(TimeFormat, Culture);
 
+        public string DateText => DateTime.Now.ToString(DateFormat, Culture);
 
         public double WindowWidthSize
         {
diff --git a/Plugins/Flow.Launcher.Plugin.Calculator/Main.cs b/Plugins/Flow.Launcher.Plugin.Calculator/Main.cs
index bc79219b6..d5dcdacea 100644
--- a/Plugins/Flow.Launcher.Plugin.Calculator/Main.cs
+++ b/Plugins/Flow.Launcher.Plugin.Calculator/Main.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Globalization;
 using System.Runtime.InteropServices;
@@ -61,7 +61,7 @@ namespace Flow.Launcher.Plugin.Caculator
                 switch (_settings.DecimalSeparator)
                 {
                     case DecimalSeparator.Comma:
-                    case DecimalSeparator.UseSystemLocale when CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator == ",":
+                    case DecimalSeparator.UseSystemLocale when CultureInfo.DefaultThreadCurrentCulture.NumberFormat.NumberDecimalSeparator == ",":
                         expression = query.Search.Replace(",", ".");
                         break;
                     default:
@@ -157,7 +157,7 @@ namespace Flow.Launcher.Plugin.Caculator
 
         private string GetDecimalSeparator()
         {
-            string systemDecimalSeperator = CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator;
+            string systemDecimalSeperator = CultureInfo.DefaultThreadCurrentCulture.NumberFormat.NumberDecimalSeparator;
             switch (_settings.DecimalSeparator)
             {
                 case DecimalSeparator.UseSystemLocale: return systemDecimalSeperator;