diff --git a/api/__pycache__/settings.cpython-313.pyc b/api/__pycache__/settings.cpython-313.pyc
index 8515a2d1..3afd3a6f 100644
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diff --git a/app/__pycache__/document_generator.cpython-313.pyc b/app/__pycache__/document_generator.cpython-313.pyc
index 3ce56329..fdb81829 100644
Binary files a/app/__pycache__/document_generator.cpython-313.pyc and b/app/__pycache__/document_generator.cpython-313.pyc differ
diff --git a/app/__pycache__/models.cpython-313.pyc b/app/__pycache__/models.cpython-313.pyc
index 8ec6c8f5..a232008f 100644
Binary files a/app/__pycache__/models.cpython-313.pyc and b/app/__pycache__/models.cpython-313.pyc differ
diff --git a/app/__pycache__/workflow_utils.cpython-313.pyc b/app/__pycache__/workflow_utils.cpython-313.pyc
index c001eda6..2094ebb0 100644
Binary files a/app/__pycache__/workflow_utils.cpython-313.pyc and b/app/__pycache__/workflow_utils.cpython-313.pyc differ
diff --git a/app/document_generator.py b/app/document_generator.py
index 7ce2bf4b..1faaf680 100644
--- a/app/document_generator.py
+++ b/app/document_generator.py
@@ -287,7 +287,7 @@ class DocumentGenerator:
                     return str(val)
             if fmt_type == "number_to_words":
                 try:
-                    return num2words(val, lang=fmt.get("lang", "en"))
+                    return num2words(val, lang=fmt.get("lang", "vi"))
                 except Exception:
                     return str(val)
             if fmt_type == "conditional":
@@ -397,16 +397,37 @@ class DocumentGenerator:
         return placeholders
 
     def _parse_format_args(self, args_string):
-        """Parses a string like 'lang:vi, type:number_to_words' into a dictionary."""
         if not args_string:
             return {}
-        format_config = {}
-        args = args_string.split(',')
-        for arg in args:
-            if ':' in arg:
-                key, value = arg.split(':', 1)
-                format_config[key.strip()] = value.strip()
-        return format_config
+
+        parts = [p.strip() for p in args_string.split(',')]
+        root = {}
+        current = root
+
+        for part in parts:
+            if ':' not in part:
+                continue
+
+            key, value = part.split(':', 1)
+            key = key.strip()
+            value = value.strip()
+
+            if key == "next":
+                # nếu next chưa tồn tại thì tạo
+                if "next" not in current or not isinstance(current["next"], dict):
+                    current["next"] = {}
+                current = current["next"]
+
+                # hỗ trợ next:type:number_to_words
+                if ':' in value:
+                    sub_key, sub_val = value.split(':', 1)
+                    current[sub_key.strip()] = sub_val.strip()
+            else:
+                current[key] = value
+
+        return root
+
+
 
     def prepare_replacements(self, doc):
         """
diff --git a/static/contract/.~lock.3. Thoả thuận thực hiện nguyện vọng cá nhân.docx# b/static/contract/.~lock.3. Thoả thuận thực hiện nguyện vọng cá nhân.docx#
new file mode 100644
index 00000000..d63325ce
--- /dev/null
+++ b/static/contract/.~lock.3. Thoả thuận thực hiện nguyện vọng cá nhân.docx#	
@@ -0,0 +1 @@
+,kumduy,duy-pc,15.01.2026 12:11,file:///home/kumduy/.config/libreoffice/4;
\ No newline at end of file
diff --git a/static/contract/3. Thoả thuận thực hiện nguyện vọng cá nhân.docx b/static/contract/3. Thoả thuận thực hiện nguyện vọng cá nhân.docx
index 437d0b86..94eb0457 100644
Binary files a/static/contract/3. Thoả thuận thực hiện nguyện vọng cá nhân.docx and b/static/contract/3. Thoả thuận thực hiện nguyện vọng cá nhân.docx differ