diff --git a/TelegramBotBase/Builder/BotBaseBuilder.cs b/TelegramBotBase/Builder/BotBaseBuilder.cs
index c3d9394..ac48601 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 Persian();
+        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