Fix localization return issue.

src/Infrastructure/BotSharp.Abstraction/Messaging/Models/RichContent/ElementButton.cs

@@ -17,6 +17,7 @@ public class ElementButton
     public string Title { get; set; } = string.Empty;
 
     [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    [Translate]
     public string Payload { get; set; }
 
     [JsonPropertyName("is_primary")]
@@ -30,5 +31,6 @@ public class ElementButton
     [JsonPropertyName("post_action_disclaimer")]
     [JsonProperty("post_action_disclaimer")]
     [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    [Translate]
     public string? PostActionDisclaimer { get; set; }
 }

src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.SendMessage.cs

@@ -130,7 +130,7 @@ public partial class ConversationService
             response.RichContent is RichContent<IRichMessage> template &&
             string.IsNullOrEmpty(template.Message.Text))
         {
-            template.Message.Text = response.Content;
+            template.Message.Text = response.SecondaryContent ?? response.Content;
         }
 
         // Only read content from RichContent for UI rendering. When richContent is null, create a basic text message for richContent.
@@ -138,7 +138,7 @@ public partial class ConversationService
         response.RichContent = response.RichContent ?? new RichContent<IRichMessage>
         {
             Recipient = new Recipient { Id = state.GetConversationId() },
-            Message = new TextMessage(response.Content)
+            Message = new TextMessage(response.SecondaryContent ?? response.Content)
         };
 
         // Patch return function name

src/Infrastructure/BotSharp.Core/Routing/RoutingService.cs

@@ -162,7 +162,7 @@ public partial class RoutingService : IRoutingService
             }
             else
             {
-                response.Content = await translator.Translate(_router,
+                response.SecondaryContent = await translator.Translate(_router,
                     message.MessageId,
                     response.Content,
                     language: inst.Language);