diff --git a/validator/validator-tests.ts b/validator/validator-tests.ts
index 96d5bc761a..748a6bf340 100644
--- a/validator/validator-tests.ts
+++ b/validator/validator-tests.ts
@@ -19,8 +19,87 @@ let any: any;
   result = validator.isAfter('sample', new Date().toString());
 
   result = validator.isAlpha('sample');
+  result = validator.isAlpha('sample', 'ar');
+  result = validator.isAlpha('sample', 'ar-AE');
+  result = validator.isAlpha('sample', 'ar-BH');
+  result = validator.isAlpha('sample', 'ar-DZ');
+  result = validator.isAlpha('sample', 'ar-EG');
+  result = validator.isAlpha('sample', 'ar-IQ');
+  result = validator.isAlpha('sample', 'ar-JO');
+  result = validator.isAlpha('sample', 'ar-KW');
+  result = validator.isAlpha('sample', 'ar-LB');
+  result = validator.isAlpha('sample', 'ar-LY');
+  result = validator.isAlpha('sample', 'ar-MA');
+  result = validator.isAlpha('sample', 'ar-QA');
+  result = validator.isAlpha('sample', 'ar-QM');
+  result = validator.isAlpha('sample', 'ar-SA');
+  result = validator.isAlpha('sample', 'ar-SD');
+  result = validator.isAlpha('sample', 'ar-SY');
+  result = validator.isAlpha('sample', 'ar-TN');
+  result = validator.isAlpha('sample', 'ar-YE');
+  result = validator.isAlpha('sample', 'cs-CZ');
+  result = validator.isAlpha('sample', 'de-DE');
+  result = validator.isAlpha('sample', 'en-AU');
+  result = validator.isAlpha('sample', 'en-GB');
+  result = validator.isAlpha('sample', 'en-HK');
+  result = validator.isAlpha('sample', 'en-IN');
+  result = validator.isAlpha('sample', 'en-NZ');
+  result = validator.isAlpha('sample', 'en-US');
+  result = validator.isAlpha('sample', 'en-ZA');
+  result = validator.isAlpha('sample', 'en-ZM');
+  result = validator.isAlpha('sample', 'es-ES');
+  result = validator.isAlpha('sample', 'fr-FR');
+  result = validator.isAlpha('sample', 'hu-HU');
+  result = validator.isAlpha('sample', 'nl-NL');
+  result = validator.isAlpha('sample', 'pl-PL');
+  result = validator.isAlpha('sample', 'pt-BR');
+  result = validator.isAlpha('sample', 'pt-PT');
+  result = validator.isAlpha('sample', 'ru-RU');
+  result = validator.isAlpha('sample', 'sr-RS');
+  result = validator.isAlpha('sample', 'sr-RS@latin');
+  result = validator.isAlpha('sample', 'tr-TR');
 
-  result = validator.isAlphanumeric('sample');
+  result = validator.isAlphanumeric('sample', 'ar');
+  result = validator.isAlphanumeric('sample', 'ar-AE');
+  result = validator.isAlphanumeric('sample', 'ar-BH');
+  result = validator.isAlphanumeric('sample', 'ar-DZ');
+  result = validator.isAlphanumeric('sample', 'ar-EG');
+  result = validator.isAlphanumeric('sample', 'ar-IQ');
+  result = validator.isAlphanumeric('sample', 'ar-JO');
+  result = validator.isAlphanumeric('sample', 'ar-KW');
+  result = validator.isAlphanumeric('sample', 'ar-LB');
+  result = validator.isAlphanumeric('sample', 'ar-LY');
+  result = validator.isAlphanumeric('sample', 'ar-MA');
+  result = validator.isAlphanumeric('sample', 'ar-QA');
+  result = validator.isAlphanumeric('sample', 'ar-QM');
+  result = validator.isAlphanumeric('sample', 'ar-SA');
+  result = validator.isAlphanumeric('sample', 'ar-SD');
+  result = validator.isAlphanumeric('sample', 'ar-SY');
+  result = validator.isAlphanumeric('sample', 'ar-TN');
+  result = validator.isAlphanumeric('sample', 'ar-YE');
+  result = validator.isAlphanumeric('sample', 'cs-CZ');
+  result = validator.isAlphanumeric('sample', 'de-DE');
+  result = validator.isAlphanumeric('sample', 'en-AU');
+  result = validator.isAlphanumeric('sample', 'en-GB');
+  result = validator.isAlphanumeric('sample', 'en-HK');
+  result = validator.isAlphanumeric('sample', 'en-IN');
+  result = validator.isAlphanumeric('sample', 'en-NZ');
+  result = validator.isAlphanumeric('sample', 'en-US');
+  result = validator.isAlphanumeric('sample', 'en-ZA');
+  result = validator.isAlphanumeric('sample', 'en-ZM');
+  result = validator.isAlphanumeric('sample', 'es-ES');
+  result = validator.isAlphanumeric('sample', 'fr-FR');
+  result = validator.isAlphanumeric('sample', 'fr-BE');
+  result = validator.isAlphanumeric('sample', 'hu-HU');
+  result = validator.isAlphanumeric('sample', 'nl-BE');
+  result = validator.isAlphanumeric('sample', 'nl-NL');
+  result = validator.isAlphanumeric('sample', 'pl-PL');
+  result = validator.isAlphanumeric('sample', 'pt-BR');
+  result = validator.isAlphanumeric('sample', 'pt-PT');
+  result = validator.isAlphanumeric('sample', 'ru-RU');
+  result = validator.isAlphanumeric('sample', 'sr-RS');
+  result = validator.isAlphanumeric('sample', 'sr-RS@latin');
+  result = validator.isAlphanumeric('sample', 'tr-TR');
 
   result = validator.isAscii('sample');
 
diff --git a/validator/validator.d.ts b/validator/validator.d.ts
index 1ec4711828..c2289cf169 100644
--- a/validator/validator.d.ts
+++ b/validator/validator.d.ts
@@ -4,6 +4,9 @@
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 declare namespace ValidatorJS {
+  type AlphaLocale = "ar" | "ar-AE" | "ar-BH" | "ar-DZ" | "ar-EG" | "ar-IQ" | "ar-JO" | "ar-KW" | "ar-LB" | "ar-LY" | "ar-MA" | "ar-QA" | "ar-QM" | "ar-SA" | "ar-SD" | "ar-SY" | "ar-TN" | "ar-YE" | "cs-CZ" | "de-DE" | "en-AU" | "en-GB" | "en-HK" | "en-IN" | "en-NZ" | "en-US" | "en-ZA" | "en-ZM" | "es-ES" | "fr-FR" | "hu-HU" | "nl-NL" | "pl-PL" | "pt-BR" | "pt-PT" | "ru-RU" | "sr-RS" | "sr-RS@latin" | "tr-TR";
+  type AlphanumericLocale = "ar" | "ar-AE" | "ar-BH" | "ar-DZ" | "ar-EG" | "ar-IQ" | "ar-JO" | "ar-KW" | "ar-LB" | "ar-LY" | "ar-MA" | "ar-QA" | "ar-QM" | "ar-SA" | "ar-SD" | "ar-SY" | "ar-TN" | "ar-YE" | "cs-CZ" | "de-DE" | "en-AU" | "en-GB" | "en-HK" | "en-IN" | "en-NZ" | "en-US" | "en-ZA" | "en-ZM" | "es-ES" | "fr-FR" | "fr-BE" | "hu-HU" | "nl-BE" | "nl-NL" | "pl-PL" | "pt-BR" | "pt-PT" | "ru-RU" | "sr-RS" | "sr-RS@latin" | "tr-TR";
+
   interface ValidatorStatic {
 
     // **************
@@ -19,11 +22,17 @@ declare namespace ValidatorJS {
     // check if the string is a date that's after the specified date (defaults to now).
     isAfter(str: string, date?: string): boolean;
 
-    // check if the string contains only letters (a-zA-Z).
-    isAlpha(str: string): boolean;
+    // check if the string contains only letters (a-zA-Z). Locale is one of ['ar', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-EG',
+    // 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-LB', 'ar-LY', 'ar-MA', 'ar-QA', 'ar-QM', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'ar-YE',
+    // 'cs-CZ', 'de-DE', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'es-ES', 'fr-FR', 'hu-HU',
+    // 'nl-NL', 'pl-PL', 'pt-BR', 'pt-PT', 'ru-RU', 'sr-RS', 'sr-RS@latin', 'tr-TR']) and defaults to en-US
+    isAlpha(str: string, locale?: AlphaLocale): boolean;
 
-    // check if the string contains only letters and numbers.
-    isAlphanumeric(str: string): boolean;
+    // check if the string contains only letters and numbers. Locale is one of ['ar', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-EG',
+    // 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-LB', 'ar-LY', 'ar-MA', 'ar-QA', 'ar-QM', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'ar-YE',
+    // 'cs-CZ', 'de-DE', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'es-ES', 'fr-FR', 'hu-HU',
+    // 'nl-NL', 'pl-PL', 'pt-BR', 'pt-PT', 'ru-RU', 'sr-RS', 'sr-RS@latin', 'tr-TR']) and defaults to en-US
+    isAlphanumeric(str: string, locale?: AlphanumericLocale): boolean;
 
     // check if the string contains ASCII chars only.
     isAscii(str: string): boolean;