Update column name: region→country

README.md

@@ -29,7 +29,7 @@ dataset_info:
     list: string
   - name: names_other
     list: string
-  - name: region
+  - name: country
     dtype: string
   - name: parent
     dtype: string
@@ -57,7 +57,7 @@ Regional subdivision codes with language selection.
 
 - **code** (string): ISO 3166-2 subdivision code (e.g., 'US-CA', 'RU-MOW')
 - **name** (string): Primary name in selected language
-- **region** (string): Parent ISO 3166-1 alpha-2 region code
+- **country** (string): Parent ISO 3166-1 alpha-2 country code
 - **name_en** (string): English name
 - **name_ru** (string): Russian name
 - **name_zh** (string): Chinese name
@@ -74,7 +74,7 @@ Regional subdivision codes with language selection.
 
 ## Language Rule
 
-Languages are determined by parent region using hardcoded mapping (same as iso_3166-1_alpha-2).
+Languages are determined by parent country using hardcoded mapping (same as iso_3166-1_alpha-2).
 
 ## Usage