diff --git a/scripts/validate_rst_title_capitalization.py b/scripts/validate_rst_title_capitalization.py
index 44318cd797163..a9d4de8c4be0c 100755
--- a/scripts/validate_rst_title_capitalization.py
+++ b/scripts/validate_rst_title_capitalization.py
@@ -14,6 +14,7 @@
 from __future__ import annotations
 
 import argparse
+import os
 import re
 import sys
 from typing import TYPE_CHECKING
@@ -31,6 +32,7 @@
     "Excel",
     "JSON",
     "HTML",
+    "XML",
     "SAS",
     "SQL",
     "BigQuery",
@@ -159,6 +161,10 @@
     "Liveserve",
     "I",
     "VSCode",
+    "RangeIndex",
+    "SparseArray",
+    "SparseDtype",
+    "HTTP",
 }
 
 CAP_EXCEPTIONS_DICT = {word.lower(): word for word in CAPITALIZATION_EXCEPTIONS}
@@ -244,6 +250,31 @@ def find_titles(rst_file: str) -> Iterable[tuple[str, int]]:
             previous_line = line_no_last_elem
 
 
+def _collect_errors(filename: str) -> int:
+    """
+    Helper method to collect the errors per file
+
+    Parameters
+    ----------
+    filename : str
+        A file to validate, provided from the main method
+
+    Returns
+    -------
+    int
+        Number of incorrect headings found.
+    """
+    errors: int = 0
+    for title, line_number in find_titles(filename):
+        if title != correct_title_capitalization(title):
+            print(
+                f"""{filename}:{line_number}:{err_msg} "{title}" to "{
+                        correct_title_capitalization(title)}" """
+            )
+            errors += 1
+    return errors
+
+
 def main(source_paths: list[str]) -> int:
     """
     The main method to print all headings with incorrect capitalization.
@@ -251,7 +282,8 @@ def main(source_paths: list[str]) -> int:
     Parameters
     ----------
     source_paths : str
-        List of directories to validate, provided through command line arguments.
+        List of directories or files to validate,
+        provided through command line arguments.
 
     Returns
     -------
@@ -261,14 +293,20 @@ def main(source_paths: list[str]) -> int:
 
     number_of_errors: int = 0
 
-    for filename in source_paths:
-        for title, line_number in find_titles(filename):
-            if title != correct_title_capitalization(title):
-                print(
-                    f"""{filename}:{line_number}:{err_msg} "{title}" to "{
-                    correct_title_capitalization(title)}" """
-                )
-                number_of_errors += 1
+    for path in source_paths:
+        # If `sourc_paths` is a dir, walk it to find the files
+        if os.path.isdir(path):
+            dirs = os.walk(path)
+            for dir in dirs:
+                files = dir[2]
+                for filename in files:
+                    if not filename.endswith(".png"):
+                        number_of_errors += _collect_errors(
+                            os.path.join(dir[0], filename)
+                        )
+        else:
+            for filename in source_paths:
+                number_of_errors += _collect_errors(filename)
 
     return number_of_errors