diff --git a/README.md b/README.md
index 8dbffd3fa..d1a6fd723 100644
--- a/README.md
+++ b/README.md
@@ -84,8 +84,8 @@ Validator                               | Description
 **contains(str, seed [, options ])**    | check if the string contains the seed.<br/><br/>`options` is an object that defaults to `{ ignoreCase: false}`.<br/>`ignoreCase` specified whether the case of the substring be same or not.  
 **equals(str, comparison)**             | check if the string matches the comparison.
 **isAfter(str [, date])**               | check if the string is a date that's after the specified date (defaults to now).
-**isAlpha(str [, locale])**             | check if the string contains only letters (a-zA-Z).<br/><br/>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', 'bg-BG', 'cs-CZ', 'da-DK', 'de-DE', 'el-GR', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'es-ES', 'fr-FR', 'fa-IR', 'he', 'hu-HU', 'it-IT', 'ku-IQ', 'nb-NO', 'nl-NL', 'nn-NO', 'pl-PL', 'pt-BR', 'pt-PT', 'ru-RU', 'sl-SI', 'sk-SK', 'sr-RS', 'sr-RS@latin', 'sv-SE', 'tr-TR', 'uk-UA']`) and defaults to `en-US`. Locale list is `validator.isAlphaLocales`.
-**isAlphanumeric(str [, locale])**      | check if the string contains only letters and numbers.<br/><br/>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', 'bg-BG', 'cs-CZ', 'da-DK', 'de-DE', 'el-GR', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'es-ES', 'fr-FR', 'fa-IR', 'he', 'hu-HU', 'it-IT', 'ku-IQ', 'nb-NO', 'nl-NL', 'nn-NO', 'pl-PL', 'pt-BR', 'pt-PT', 'ru-RU', 'sl-SI', 'sk-SK', 'sr-RS', 'sr-RS@latin', 'sv-SE', 'tr-TR', 'uk-UA']`) and defaults to `en-US`. Locale list is `validator.isAlphanumericLocales`.
+**isAlpha(str [, locale])**             | check if the string contains only letters (a-zA-Z).<br/><br/>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', 'bg-BG', 'cs-CZ', 'da-DK', 'de-DE', 'el-GR', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'es-ES', 'fr-FR', 'fa-IR', 'he', 'hu-HU', 'it-IT', 'ku-IQ', 'nb-NO', 'nl-NL', 'nn-NO', 'pl-PL', 'pt-BR', 'pt-PT', 'ru-RU', 'sl-SI', 'sk-SK', 'sr-RS', 'sr-RS@latin', 'sv-SE', 'tr-TR', 'uk-UA', 'vi-VN']`) and defaults to `en-US`. Locale list is `validator.isAlphaLocales`.
+**isAlphanumeric(str [, locale])**      | check if the string contains only letters and numbers.<br/><br/>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', 'bg-BG', 'cs-CZ', 'da-DK', 'de-DE', 'el-GR', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'es-ES', 'fr-FR', 'fa-IR', 'he', 'hu-HU', 'it-IT', 'ku-IQ', 'nb-NO', 'nl-NL', 'nn-NO', 'pl-PL', 'pt-BR', 'pt-PT', 'ru-RU', 'sl-SI', 'sk-SK', 'sr-RS', 'sr-RS@latin', 'sv-SE', 'tr-TR', 'uk-UA', 'vi-VN']`) and defaults to `en-US`. Locale list is `validator.isAlphanumericLocales`.
 **isAscii(str)**                        | check if the string contains ASCII chars only.
 **isBase32(str)**                       | check if a string is base32 encoded.
 **isBase64(str [, options])**          | check if a string is base64 encoded. options is optional and defaults to `{urlSafe: false}`<br/> when `urlSafe` is true it tests the given base64 encoded string is [url safe](https://base64.guru/standards/base64url)
diff --git a/src/lib/alpha.js b/src/lib/alpha.js
index a253100dc..c2b16a2ac 100644
--- a/src/lib/alpha.js
+++ b/src/lib/alpha.js
@@ -22,6 +22,7 @@ export const alpha = {
   'sv-SE': /^[A-ZÅÄÖ]+$/i,
   'tr-TR': /^[A-ZÇĞİıÖŞÜ]+$/i,
   'uk-UA': /^[А-ЩЬЮЯЄIЇҐі]+$/i,
+  'vi-VN': /^[A-ZÀÁẠẢÃÂẦẤẬẨẪĂẰẮẶẲẴĐÈÉẸẺẼÊỀẾỆỂỄÌÍỊỈĨÒÓỌỎÕÔỒỐỘỔỖƠỜỚỢỞỠÙÚỤỦŨƯỪỨỰỬỮỲÝỴỶỸ]+$/i,
   'ku-IQ': /^[ئابپتجچحخدرڕزژسشعغفڤقکگلڵمنوۆھەیێيطؤثآإأكضصةظذ]+$/i,
   ar: /^[ءآأؤإئابةتثجحخدذرزسشصضطظعغفقكلمنهوىيًٌٍَُِّْٰ]+$/,
   he: /^[א-ת]+$/,
@@ -53,6 +54,7 @@ export const alphanumeric = {
   'tr-TR': /^[0-9A-ZÇĞİıÖŞÜ]+$/i,
   'uk-UA': /^[0-9А-ЩЬЮЯЄIЇҐі]+$/i,
   'ku-IQ': /^[٠١٢٣٤٥٦٧٨٩0-9ئابپتجچحخدرڕزژسشعغفڤقکگلڵمنوۆھەیێيطؤثآإأكضصةظذ]+$/i,
+  'vi-VN': /^[0-9A-ZÀÁẠẢÃÂẦẤẬẨẪĂẰẮẶẲẴĐÈÉẸẺẼÊỀẾỆỂỄÌÍỊỈĨÒÓỌỎÕÔỒỐỘỔỖƠỜỚỢỞỠÙÚỤỦŨƯỪỨỰỬỮỲÝỴỶỸ]+$/i,
   ar: /^[٠١٢٣٤٥٦٧٨٩0-9ءآأؤإئابةتثجحخدذرزسشصضطظعغفقكلمنهوىيًٌٍَُِّْٰ]+$/,
   he: /^[0-9א-ת]+$/,
   'fa-IR': /^['0-9آابپتثجچهخدذرزژسشصضطظعغفقکگلمنوهی۱۲۳۴۵۶۷۸۹۰']+$/i,
@@ -91,7 +93,7 @@ export const dotDecimal = ['ar-EG', 'ar-LB', 'ar-LY'];
 export const commaDecimal = [
   'bg-BG', 'cs-CZ', 'da-DK', 'de-DE', 'el-GR', 'en-ZM', 'es-ES', 'fr-FR', 'it-IT', 'ku-IQ', 'hu-HU', 'nb-NO',
   'nn-NO', 'nl-NL', 'pl-PL', 'pt-PT', 'ru-RU', 'sl-SI', 'sr-RS@latin',
-  'sr-RS', 'sv-SE', 'tr-TR', 'uk-UA',
+  'sr-RS', 'sv-SE', 'tr-TR', 'uk-UA', 'vi-VN',
 ];
 
 for (let i = 0; i < dotDecimal.length; i++) {
diff --git a/test/validators.js b/test/validators.js
index f84c73db0..0040f72fe 100755
--- a/test/validators.js
+++ b/test/validators.js
@@ -1048,6 +1048,26 @@ describe('Validators', () => {
     });
   });
 
+  it('should validate Vietnamese alpha strings', () => {
+    test({
+      validator: 'isAlpha',
+      args: ['vi-VN'],
+      valid: [
+        'thiến',
+        'nghiêng',
+        'xin',
+        'chào',
+        'thế',
+        'giới',
+      ],
+      invalid: [
+        'thầy3',
+        'Ba gà',
+        '',
+      ],
+    });
+  });
+
   it('should validate arabic alpha strings', () => {
     test({
       validator: 'isAlpha',
@@ -1558,6 +1578,21 @@ describe('Validators', () => {
     });
   });
 
+  it('should validate Vietnamese alphanumeric strings', () => {
+    test({
+      validator: 'isAlphanumeric',
+      args: ['vi-VN'],
+      valid: [
+        'Thầy3',
+        '3Gà',
+      ],
+      invalid: [
+        'toang!',
+        'Cậu Vàng',
+      ],
+    });
+  });
+
   it('should validate arabic alphanumeric strings', () => {
     test({
       validator: 'isAlphanumeric',