feat(sdk): add multilingual param to project update (#4314)

Co-authored-by: Soumil Rathi <soumilrathi@gmail.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

docs/api-reference/organizations-projects.mdx

@@ -82,7 +82,7 @@ new_project = client.project.create(
 
 ### Update Project Settings
 
-Modify project configuration including custom instructions, categories, and graph settings:
+Modify project configuration including custom instructions, categories, graph settings, and language preferences:
 
 ```python
 # Update project with custom categories
@@ -101,6 +101,9 @@ client.project.update(
 # Enable graph memory for the project
 client.project.update(enable_graph=True)
 
+# Use the input language for memory storage and retrieval
+client.project.update(multilingual=True)
+
 # Update multiple settings at once
 client.project.update(
     custom_instructions="...",
@@ -108,7 +111,8 @@ client.project.update(
         {"personal_info": "User personal information and preferences"},
         {"work_context": "Professional context and work-related information"}
     ],
-    enable_graph=True
+    enable_graph=True,
+    multilingual=True
 )
 ```