diff --git a/CHANGELOG.md b/CHANGELOG.md
index b18f2373f..45a7f6715 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 #### HEAD
 
+- Added Spanish, French, Portuguese and Dutch support for `isAlpha()` and `isAlphanumeric()`
+  ([#492](https://github.com/chriso/validator.js/pull/492))
 - Added a Brazilian locale to `isMobilePhone()`
   ([#489](https://github.com/chriso/validator.js/pull/489))
 - Reject IPv4 addresses with invalid zero padding
diff --git a/test/validators.js b/test/validators.js
index dd3920421..7af9260e9 100644
--- a/test/validators.js
+++ b/test/validators.js
@@ -598,6 +598,24 @@ describe('Validators', function () {
         });
     });
 
+    it('should validate defined english aliases', function () {
+        test({
+            validator: 'isAlphanumeric'
+          , args: ['en-GB']
+          , valid: [
+                'abc123'
+              , 'ABC11'
+            ]
+          , invalid: [
+                'abc '
+              , 'foo!!'
+              , 'ÄBC'
+              , 'FÜübar'
+              , 'Jön'
+            ]
+        });
+    });
+
     it('should validate german alphanumeric strings', function () {
         test({
             validator: 'isAlphanumeric'
@@ -613,6 +631,31 @@ describe('Validators', function () {
         });
     });
 
+    it('should validate spanish alphanumeric strings', function () {
+        test({
+            validator: 'isAlphanumeric'
+          , args: ['es-ES']
+          , valid: [
+                'ábcó123'
+              , 'ÁBCÓ11'
+            ]
+          , invalid: [
+                'äca '
+              , 'abcß'
+              , 'föö!!'
+            ]
+        });
+    });
+
+    it('should error on invalid locale', function () {
+        try {
+            validator.isAlphanumeric("abc123", "in-INVALID");
+            assert(false);
+        } catch (err) {
+            assert(true);
+        }
+    });
+
     it('should validate numeric strings', function () {
         test({
             validator: 'isNumeric'
diff --git a/validator.js b/validator.js
index c3c46fd2e..ec090704e 100644
--- a/validator.js
+++ b/validator.js
@@ -67,12 +67,28 @@
     var alpha = {
         'en-US': /^[A-Z]+$/i,
         'de-DE': /^[A-ZÄÖÜß]+$/i,
+        'es-ES': /^[A-ZÁÉÍÑÓÚÜ]+$/i,
+        'fr-FR': /^[A-ZÀÂÆÇÉÈÊËÏÎÔŒÙÛÜŸ]+$/i,
+        'nl-NL': /^[A-ZÉËÏÓÖÜ]+$/i,
+        'pt-PT': /^[A-ZÃÁÀÂÇÉÊÍÕÓÔÚÜ]+$/i
       }
       , alphanumeric = {
         'en-US': /^[0-9A-Z]+$/i,
-        'de-DE': /^[0-9A-ZÄÖÜß]+$/i
-      }
-      , numeric = /^[-+]?[0-9]+$/
+        'de-DE': /^[0-9A-ZÄÖÜß]+$/i,
+        'es-ES': /^[0-9A-ZÁÉÍÑÓÚÜ]+$/i,
+        'fr-FR': /^[0-9A-ZÀÂÆÇÉÈÊËÏÎÔŒÙÛÜŸ]+$/i,
+        'nl-NL': /^[0-9A-ZÉËÏÓÖÜ]+$/i,
+        'pt-PT': /^[0-9A-ZÃÁÀÂÇÉÊÍÕÓÔÚÜ]+$/i
+      };
+
+    var englishLocales = ['AU', 'GB', 'HK', 'IN', 'NZ', 'ZA', 'ZM'];
+    for (var locale, i = 0; i < englishLocales.length; i++) {
+        locale = 'en-' + englishLocales[i];
+        alpha[locale] = alpha['en-US'];
+        alphanumeric[locale] = alphanumeric['en-US'];
+    }
+
+    var numeric = /^[-+]?[0-9]+$/
       , int = /^(?:[-+]?(?:0|[1-9][0-9]*))$/
       , float = /^(?:[-+]?(?:[0-9]+))?(?:\.[0-9]*)?(?:[eE][\+\-]?(?:[0-9]+))?$/
       , hexadecimal = /^[0-9A-F]+$/i
@@ -89,27 +105,27 @@
     var base64 = /^(?:[A-Z0-9+\/]{4})*(?:[A-Z0-9+\/]{2}==|[A-Z0-9+\/]{3}=|[A-Z0-9+\/]{4})$/i;
 
     var phones = {
-      'zh-CN': /^(\+?0?86\-?)?((13\d|14[57]|15[^4,\D]|17[678]|18\d)\d{8}|170[059]\d{7})$/,
-      'zh-TW': /^(\+?886\-?|0)?9\d{8}$/,
-      'en-ZA': /^(\+?27|0)\d{9}$/,
+      'en-US': /^(\+?1)?[2-9]\d{2}[2-9](?!11)\d{6}$/,
+      'de-DE': /^(\+?49[ \.\-])?([\(]{1}[0-9]{1,6}[\)])?([0-9 \.\-\/]{3,20})((x|ext|extension)[ ]?[0-9]{1,4})?$/,
+      'el-GR': /^(\+?30)?(69\d{8})$/,
       'en-AU': /^(\+?61|0)4\d{8}$/,
+      'en-GB': /^(\+?44|0)7\d{9}$/,
       'en-HK': /^(\+?852\-?)?[569]\d{3}\-?\d{4}$/,
+      'en-IN': /^(\+?91|0)?[789]\d{9}$/,
+      'en-NZ': /^(\+?64|0)2\d{7,9}$/,
+      'en-ZA': /^(\+?27|0)\d{9}$/,
+      'en-ZM': /^(\+?26)?09[567]\d{7}$/,
+      'es-ES': /^(\+?34)?(6\d{1}|7[1234])\d{7}$/,
+      'fi-FI': /^(\+?358|0)\s?(4(0|1|2|4|5)?|50)\s?(\d\s?){4,8}\d$/,
       'fr-FR': /^(\+?33|0)[67]\d{8}$/,
+      'nb-NO': /^(\+?47)?[49]\d{7}$/,
+      'nn-NO': /^(\+?47)?[49]\d{7}$/,
       'pt-BR': /^(\+?55|0)\-?[1-9]{2}\-?[2-9]{1}\d{3,4}\-?\d{4}$/,
       'pt-PT': /^(\+?351)?9[1236]\d{7}$/,
-      'el-GR': /^(\+?30)?(69\d{8})$/,
-      'en-GB': /^(\+?44|0)7\d{9}$/,
-      'en-US': /^(\+?1)?[2-9]\d{2}[2-9](?!11)\d{6}$/,
-      'en-ZM': /^(\+?26)?09[567]\d{7}$/,
       'ru-RU': /^(\+?7|8)?9\d{9}$/,
-      'nb-NO': /^(\+?47)?[49]\d{7}$/,
-      'nn-NO': /^(\+?47)?[49]\d{7}$/,
       'vi-VN': /^(\+?84|0)?((1(2([0-9])|6([2-9])|88|99))|(9((?!5)[0-9])))([0-9]{7})$/,
-      'en-NZ': /^(\+?64|0)2\d{7,9}$/,
-      'en-IN': /^(\+?91|0)?[789]\d{9}$/,
-      'es-ES': /^(\+?34)?(6\d{1}|7[1234])\d{7}$/,
-      'de-DE': /^(\+?49[ \.\-])?([\(]{1}[0-9]{1,6}[\)])?([0-9 \.\-\/]{3,20})((x|ext|extension)[ ]?[0-9]{1,4})?$/,
-      'fi-FI': /^(\+?358|0)\s?(4(0|1|2|4|5)?|50)\s?(\d\s?){4,8}\d$/
+      'zh-CN': /^(\+?0?86\-?)?((13\d|14[57]|15[^4,\D]|17[678]|18\d)\d{8}|170[059]\d{7})$/,
+      'zh-TW': /^(\+?886\-?|0)?9\d{8}$/
     };
 
     // from http://goo.gl/0ejHHW
@@ -451,12 +467,18 @@
 
     validator.isAlpha = function (str, locale) {
         locale = locale || 'en-US';
-        return alpha[locale].test(str);
+        if (locale in alpha) {
+            return alpha[locale].test(str);
+        }
+        throw new Error('Invalid locale \'' + locale + '\'');
     };
 
     validator.isAlphanumeric = function (str, locale) {
         locale = locale || 'en-US';
-        return alphanumeric[locale].test(str);
+        if (locale in alphanumeric) {
+            return alphanumeric[locale].test(str);
+        }
+        throw new Error('Invalid locale \'' + locale + '\'');
     };
 
     validator.isNumeric = function (str) {