Handle lang_dir in stats.py

Author: rffontenelle

scripts/stats.py

@@ -17,11 +17,16 @@
 
 def main() -> None:
     """Main function to generate translation stats."""
-    language = os.environ.get("PYDOC_LANGUAGE")
-    if not language:
-        raise ValueError("Environment variable PYDOC_LANGUAGE is not set.")
 
-    pofiles_path = Path(f"cpython/Doc/locales/{language}/LC_MESSAGES")
+    lang_dir = os.environ.get("PYDOC_LANG_DIR")
+    if lang_dir:
+        pofiles_path = lang_dir
+    else:
+         language = os.environ.get("PYDOC_LANGUAGE")
+         if not language:
+             raise ValueError("Environment variable PYDOC_LANGUAGE is not set.")
+         pofiles_path = Path(f"cpython/Doc/locales/{language}/LC_MESSAGES")
+
     if not pofiles_path.exists():
         raise FileNotFoundError(f"Path does not exist: {pofiles_path}")