diff --git a/README.md b/README.md
index e31fb268..a377583f 100755
--- a/README.md
+++ b/README.md
@@ -319,6 +319,7 @@ SeleniumBase provides additional ``pytest`` command-line options for tests:
 --extension-dir=DIR  # (Load a Chrome Extension directory, comma-separated.)
 --headless  # (Run tests headlessly. Default mode on Linux OS.)
 --headed  # (Run tests with a GUI on Linux OS.)
+--locale=LOCALE_CODE  # (Set the Language Locale Code for the web browser.)
 --start-page=URL  # (The starting URL for the web browser when tests begin.)
 --archive-logs  # (Archive old log files instead of deleting them.)
 --time-limit=SECONDS  # (Safely fail any test that exceeds the limit limit.)
diff --git a/help_docs/ReadMe.md b/help_docs/ReadMe.md
index afe76646..dcf0a150 100755
--- a/help_docs/ReadMe.md
+++ b/help_docs/ReadMe.md
@@ -17,6 +17,7 @@
 <div><a href="https://seleniumbase.io/seleniumbase/console_scripts/ReadMe/"><b>Console Scripts Tutorial</b></a></div>
 <div><a href="https://seleniumbase.io/help_docs/mobile_testing/"><b>Mobile Device Testing</b></a></div>
 <div><a href="https://seleniumbase.io/help_docs/method_summary/"><b>Method Summary (API Ref)</b></a></div>
+<div><a href="https://seleniumbase.io/help_docs/locale_codes/"><b>Language Locale Codes</b></a></div>
 <div><a href="https://seleniumbase.io/help_docs/translations/"><b>Language Translations</b></a></div>
 <div><a href="https://seleniumbase.io/help_docs/js_package_manager/"><b>JS Package Manager</b></a></div>
 <div><a href="https://seleniumbase.io/examples/tour_examples/ReadMe/"><b>Tour Examples</b></a></div>
@@ -45,6 +46,7 @@
 <div><a href="https://seleniumbase.com/seleniumbase/console_scripts/"><b>Console Scripts Tutorial</b></a></div>
 <div><a href="https://seleniumbase.com/help_docs/mobile_testing"><b>Mobile Device Testing</b></a></div>
 <div><a href="https://seleniumbase.com/help_docs/method_summary"><b>Method Summary (API Ref)</b></a></div>
+<div><a href="https://seleniumbase.com/help_docs/locale_codes"><b>Language Locale Codes</b></a></div>
 <div><a href="https://seleniumbase.com/help_docs/translations"><b>Language Translations</b></a></div>
 <div><a href="https://seleniumbase.com/help_docs/js_package_manager"><b>JS Package Manager</b></a></div>
 <div><a href="https://seleniumbase.com/examples/tour_examples/"><b>Tour Examples</b></a></div>
diff --git a/mkdocs.yml b/mkdocs.yml
index 326b0186..f9fbb0d7 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -67,6 +67,7 @@ nav:
   - Examples: examples/ReadMe.md
   - API Reference: help_docs/method_summary.md
   - Languages / 语言:
+    - Locale Codes: help_docs/locale_codes.md 
     - Translations: help_docs/translations.md
     - Chinese / 中文文件: help_docs/chinese.md
   - Mobile Testing: help_docs/mobile_testing.md