Added the culture setting entries

I18N Commander/UI WinForms/Components/Setting.cs

@@ -150,8 +150,63 @@ public sealed partial class Setting : UserControl
         return new Setting(settingData);
     }
 
+    private static IEnumerable<Task<Setting>> ShowCultureSettingsAsync()
+    {
+        var isFirstCulture = true; // We need this flag to distinguish the first task from the others.
+        var numberOfCultures = int.MaxValue; // There is always at least one culture, which is the default culture. We update this value later, out of the tasks.
+        while (numberOfCultures > 0)
+        {
+            var innerLoopIndex = numberOfCultures; // needed to avoid closure issues.
+            yield return Task.Run(async () =>
+            {
+                var localCultureIndex = innerLoopIndex;
+                
+                // Get the total number of cultures. We cannot do this in the outer loop,
+                // because we cannot await there. The AppSettings is caching the answer, though.
+                var numberCultures = await AppSettings.GetNumberCultures();
+                
+                // Update the number of cultures in the outer loop for the first call:
+                if(isFirstCulture)
+                {
+                    localCultureIndex = numberCultures;
+                    numberOfCultures = numberCultures;
+                    isFirstCulture = false;
+                }
+
+                // Get the current culture code:
+                var currentCultureCode = await AppSettings.GetCultureCode(localCultureIndex);
+                
+                // Construct the setting:
+                return new Setting(new()
+                {
+                    Icon = Icons.icons8_chat_bubble_512,
+                    SettingName = () => $"{localCultureIndex}. Culture",
+                    SettingExplanation = () => "The culture according to RFC 4646: First comes the ISO 639-1 language code in lower case, followed by a hyphen, followed by the ISO 3166-1 alpha-2 country code in upper case. Example: en-US for English in the USA, de-DE for German in Germany.",
+                    SetupDataControl = () =>
+                    {
+                        var textbox = new TextBox();
+                        textbox.Text = currentCultureCode;
+                        textbox.TextChanged += async (sender, args) =>
+                        {
+                            await AppSettings.SetCultureCode(localCultureIndex, textbox.Text);
+                        };
+                        textbox.Dock = DockStyle.Fill;
+                        return textbox;
+                    }
+                });
+            });
+            
+            numberOfCultures--;
+        }
+    }
+
     public static IEnumerable<Task<Setting>> GetAllSettings()
     {
+        foreach (var setting in ShowCultureSettingsAsync())
+        {
+            yield return setting;
+        }
+        
         yield return ShowDeepLActionSettingAsync();
         yield return ShowDeepLAPIKeySettingAsync();
         yield return ShowDeepLModeSettingAsync();