diff --git a/TelegramBotBase/Builder/BotBaseBuilder.cs b/TelegramBotBase/Builder/BotBaseBuilder.cs
index c3d9394..39bb317 100644
--- a/TelegramBotBase/Builder/BotBaseBuilder.cs
+++ b/TelegramBotBase/Builder/BotBaseBuilder.cs
@@ -391,29 +391,41 @@ public class BotBaseBuilder : IAPIKeySelectionStage, IMessageLoopSelectionStage,
 
     #region "Step 7 (Language)"
 
+    /// <inheritdoc cref="ILanguageSelectionStage.DefaultLanguage"/>
     public IBuildingStage DefaultLanguage()
     {
         return this;
     }
 
+    /// <inheritdoc cref="ILanguageSelectionStage.UseEnglish"/>
     public IBuildingStage UseEnglish()
     {
         Default.Language = new English();
         return this;
     }
 
+    /// <inheritdoc cref="ILanguageSelectionStage.UseGerman"/>
     public IBuildingStage UseGerman()
     {
         Default.Language = new German();
         return this;
     }
 
+    /// <inheritdoc cref="ILanguageSelectionStage.UsePersian"/>
     public IBuildingStage UsePersian()
     {
         Default.Language = new Persian();
         return this;
     }
 
+    /// <inheritdoc cref="ILanguageSelectionStage.UseRussian"/>
+    public IBuildingStage UseRussian()
+    {
+        Default.Language = new Russian();
+        return this;
+    }
+
+    /// <inheritdoc cref="ILanguageSelectionStage.Custom"/>
     public IBuildingStage Custom(Localization language)
     {
         Default.Language = language;
diff --git a/TelegramBotBase/Builder/Interfaces/ILanguageSelectionStage.cs b/TelegramBotBase/Builder/Interfaces/ILanguageSelectionStage.cs
index 8021ee2..b06addd 100644
--- a/TelegramBotBase/Builder/Interfaces/ILanguageSelectionStage.cs
+++ b/TelegramBotBase/Builder/Interfaces/ILanguageSelectionStage.cs
@@ -2,35 +2,44 @@
 
 namespace TelegramBotBase.Builder.Interfaces;
 
+/// <summary>
+/// Represents the language selection stage in the localization process.
+/// </summary>
 public interface ILanguageSelectionStage
 {
     /// <summary>
     ///     Selects the default language for control usage. (English)
     /// </summary>
-    /// <returns></returns>
+    /// <returns>The next stage in the building process.</returns>
     IBuildingStage DefaultLanguage();
 
     /// <summary>
     ///     Selects english as the default language for control labels.
     /// </summary>
-    /// <returns></returns>
+    /// <returns>The next stage in the building process.</returns>
     IBuildingStage UseEnglish();
 
     /// <summary>
     ///     Selects german as the default language for control labels.
     /// </summary>
-    /// <returns></returns>
+    /// <returns>The next stage in the building process.</returns>
     IBuildingStage UseGerman();
 
     /// <summary>
     ///     Selects persian as the default language for control labels.
     /// </summary>
-    /// <returns></returns>
+    /// <returns>The next stage in the building process.</returns>
     IBuildingStage UsePersian();
 
+    /// <summary>
+    ///     Selects russian as the default language for control labels.
+    /// </summary>
+    /// <returns>The next stage in the building process.</returns>
+    IBuildingStage UseRussian();
+
     /// <summary>
     ///     Selects a custom language as the default language for control labels.
     /// </summary>
-    /// <returns></returns>
+    /// <returns>The next stage in the building process.</returns>
     IBuildingStage Custom(Localization language);
 }
\ No newline at end of file
diff --git a/TelegramBotBase/Localizations/Russian.cs b/TelegramBotBase/Localizations/Russian.cs
new file mode 100644
index 0000000..9045d44
--- /dev/null
+++ b/TelegramBotBase/Localizations/Russian.cs
@@ -0,0 +1,36 @@
+namespace TelegramBotBase.Localizations;
+
+public sealed class Russian : Localization
+{
+    public Russian()
+    {
+        Values["Language"] = "Русский (Russian)";
+        Values["ButtonGrid_Title"] = "Меню";
+        Values["ButtonGrid_NoItems"] = "Нет доступных элементов.";
+        Values["ButtonGrid_PreviousPage"] = "◀️";
+        Values["ButtonGrid_NextPage"] = "▶️";
+        Values["ButtonGrid_CurrentPage"] = "Страница {0} из {1}";
+        Values["ButtonGrid_SearchFeature"] = "💡 Отправьте сообщение, чтобы отфильтровать список. Нажмите на 🔍, чтобы сбросить фильтр.";
+        Values["ButtonGrid_Back"] = "Назада";
+        Values["ButtonGrid_CheckAll"] = "Выделить все";
+        Values["ButtonGrid_UncheckAll"] = "Отменить выбор";
+        Values["CalendarPicker_Title"] = "Календарь / Выберите дату";
+        Values["CalendarPicker_PreviousPage"] = "◀️";
+        Values["CalendarPicker_NextPage"] = "▶️";
+        Values["TreeView_Title"] = "Выберите пункт";
+        Values["TreeView_LevelUp"] = "🔼 Обратно";
+        Values["ToggleButton_On"] = "Вкл";
+        Values["ToggleButton_Off"] = "Выкл";
+        Values["ToggleButton_OnIcon"] = "⚫";
+        Values["ToggleButton_OffIcon"] = "⚪";
+        Values["ToggleButton_Title"] = "Переключить";
+        Values["ToggleButton_Changed"] = "Выбрано";
+        Values["MultiToggleButton_SelectedIcon"] = "✅";
+        Values["MultiToggleButton_Title"] = "Множественный выбор";
+        Values["MultiToggleButton_Changed"] = "Выбрано";
+        Values["PromptDialog_Back"] = "Назад";
+        Values["ToggleButton_Changed"] = "Настройки изменены";
+        Values["ButtonGrid_SearchIcon"] = "🔍";
+        Values["ButtonGrid_TagIcon"] = "📁";
+    }
+}
\ No newline at end of file