diff --git a/readme.md b/readme.md
index 2e31e54..351ec8b 100644
--- a/readme.md
+++ b/readme.md
@@ -201,7 +201,7 @@ class Country extends Eloquent
 ### Available methods 
 
 ```php
-// This is how we determine the current locale.
+// Before we get started, this is how we determine the current locale.
 // It is set by laravel or other packages.
 App::getLocale(); // 'fr' 
 
diff --git a/src/Translatable/Translatable.php b/src/Translatable/Translatable.php
index 2059f77..af38bd9 100644
--- a/src/Translatable/Translatable.php
+++ b/src/Translatable/Translatable.php
@@ -12,7 +12,7 @@ trait Translatable
     /**
      * Alias for getTranslation()
      *
-     * @param strign|null $locale
+     * @param string|null $locale
      * @param bool $withFallback
      *
      * @return \Illuminate\Database\Eloquent\Model|null
@@ -316,17 +316,35 @@ protected function isKeyALocale($key)
      */
     protected function getLocales()
     {
-        $config = App::make('config');
-        $locales = (array) $config->get('translatable.locales', []);
+        $localesConfig = (array) App::make('config')->get('translatable.locales');
 
-        if (empty($locales)) {
+        if (empty($localesConfig)) {
             throw new LocalesNotDefinedException('Please make sure you have run "php artisan config:publish dimsav/laravel-translatable" '.
                 ' and that the locales configuration is defined.');
         }
 
+        $locales = [];
+        foreach ($localesConfig as $key => $locale) {
+            if (is_array($locale)) {
+                $locales[] = $key;
+                foreach ($locale as $countryLocale) {
+                    $locales[] = $key.$this->getLocaleSeparator().$countryLocale;
+                }
+            } else {
+                $locales[] = $locale;
+            }
+        }
+
         return $locales;
     }
 
+    /**
+     * @return string
+     */
+    protected function getLocaleSeparator() {
+        return App::make('config')->get('translatable.locale_separator', '-');
+    }
+
     /**
      * @return bool
      */
diff --git a/src/config/translatable.php b/src/config/translatable.php
index 1febd0e..8873ab6 100644
--- a/src/config/translatable.php
+++ b/src/config/translatable.php
@@ -10,7 +10,26 @@
     | Contains an array with the applications available locales.
     |
     */
-    'locales' => ['en', 'es'],
+    'locales' => [
+        'en',
+        'fr',
+        'es' => [
+            'MX', // mexican spanish
+            'CO', // colombian spanish
+        ],
+    ],
+
+    /*
+    |--------------------------------------------------------------------------
+    | Locale separator
+    |--------------------------------------------------------------------------
+    |
+    | This is a string used to glue the language and the country when defining
+    | the available locales. Example: if set to '-', then the locale for
+    | colombian spanish will be saved as 'es-CO' into the database.
+    |
+    */
+    'locale_separator' => '-',
 
     /*
     |--------------------------------------------------------------------------
diff --git a/tests/TranslatableTest.php b/tests/TranslatableTest.php
index 78ab280..91b36fd 100644
--- a/tests/TranslatableTest.php
+++ b/tests/TranslatableTest.php
@@ -3,6 +3,7 @@
 use Dimsav\Translatable\Test\Model\Country;
 use Dimsav\Translatable\Test\Model\CountryStrict;
 use Dimsav\Translatable\Test\Model\CountryWithCustomLocaleKey;
+use Dimsav\Translatable\Test\Model\Food;
 
 class TranslatableTest extends TestsBase
 {
@@ -365,4 +366,33 @@ public function test_config_overrides_apps_locale()
 
         $this->assertSame('Griechenland', $country->name);
     }
+
+    public function test_locales_as_array_keys_are_properly_detected()
+    {
+        $this->app->config->set('translatable.locales', ['en' => ['US','GB']]);
+
+        $data = [
+            'en' => ['name' => 'French fries'],
+            'en-US' => ['name' => 'American french fries'],
+            'en-GB' => ['name' => 'Chips'],
+        ];
+        $frenchFries = Food::create($data);
+
+        $this->assertSame('French fries', $frenchFries->getTranslation('en')->name);
+        $this->assertSame('Chips', $frenchFries->getTranslation('en-GB')->name);
+        $this->assertSame('American french fries', $frenchFries->getTranslation('en-US')->name);
+    }
+
+    public function test_locale_separator_can_be_configured()
+    {
+        $this->app->config->set('translatable.locales', ['en' => ['GB']]);
+        $this->app->config->set('translatable.locale_separator', '_');
+        $data = [
+            'en_GB' => ['name' => 'Chips'],
+        ];
+        $frenchFries = Food::create($data);
+
+        $this->assertSame('Chips', $frenchFries->getTranslation('en_GB')->name);
+    }
+
 }
diff --git a/tests/migrations/2013_11_28_152610_create_tables.php b/tests/migrations/2013_11_28_152610_create_tables.php
index b50ef94..d53b6eb 100644
--- a/tests/migrations/2013_11_28_152610_create_tables.php
+++ b/tests/migrations/2013_11_28_152610_create_tables.php
@@ -56,6 +56,21 @@ public function up()
             $table->timestamps();
         });
 
+        Schema::create('foods', function (Blueprint $table) {
+            $table->increments('id');
+            $table->timestamps();
+        });
+
+        Schema::create('food_translations', function (Blueprint $table) {
+            $table->increments('id');
+            $table->integer('food_id')->unsigned();
+            $table->string('name');
+            $table->string('locale')->index();
+
+            $table->unique(['food_id', 'locale']);
+            $table->foreign('food_id')->references('id')->on('foods')->onDelete('cascade');
+        });
+
         Schema::create('continent_translations', function (Blueprint $table) {
             $table->increments('id');
             $table->integer('continent_id')->unsigned();
@@ -80,5 +95,7 @@ public function down()
 
         Schema::dropIfExists('continent_translations');
         Schema::dropIfExists('continents');
+        Schema::dropIfExists('food_translations');
+        Schema::dropIfExists('foods');
     }
 }
diff --git a/tests/models/Food.php b/tests/models/Food.php
new file mode 100644
index 0000000..400a13a
--- /dev/null
+++ b/tests/models/Food.php
@@ -0,0 +1,49 @@
+<?php namespace Dimsav\Translatable\Test\Model;
+
+use Dimsav\Translatable\Translatable;
+use Illuminate\Database\Eloquent\Model as Eloquent;
+
+class Food extends Eloquent
+{
+    use Translatable;
+
+    /**
+     * Array with the fields translated in the Translation table.
+     *
+     * @var array
+     */
+    public $translatedAttributes = ['name'];
+
+    /**
+     * Set $translationModel if you want to overwrite the convention
+     * for the name of the translation Model. Use full namespace if applied.
+     *
+     * The convention is to add "Translation" to the name of the class extending Translatable.
+     * Example: Country => CountryTranslation
+     */
+    public $translationModel;
+
+    /**
+     * This is the foreign key used to define the translation relationship.
+     * Set this if you want to overwrite the laravel default for foreign keys.
+     *
+     * @var
+     */
+    public $translationForeignKey;
+
+    /**
+     * Add your translated attributes here if you want
+     * fill them with mass assignment.
+     *
+     * @var array
+     */
+    public $fillable = ['name'];
+
+    /**
+     * The database field being used to define the locale parameter in the translation model.
+     * Defaults to 'locale'.
+     *
+     * @var string
+     */
+    public $localeKey;
+}
diff --git a/tests/models/FoodTranslation.php b/tests/models/FoodTranslation.php
new file mode 100644
index 0000000..b60ea3d
--- /dev/null
+++ b/tests/models/FoodTranslation.php
@@ -0,0 +1,8 @@
+<?php namespace Dimsav\Translatable\Test\Model;
+
+use Illuminate\Database\Eloquent\Model as Eloquent;
+
+class FoodTranslation extends Eloquent
+{
+    public $timestamps = false;
+}