diff --git a/src/Locale.php b/src/Locale.php
index 8cafabf..b2c4bd1 100644
--- a/src/Locale.php
+++ b/src/Locale.php
@@ -32,7 +32,7 @@ class Locale implements LocaleInterface
     protected $configFile = '';
 
     /**
-     * @var array Locale config data, loaded from the locale YAML file
+     * @var string[] Locale config data, loaded from the locale YAML file
      */
     protected $config;
 
@@ -60,6 +60,11 @@ protected function loadConfig(): void
     {
         $loader = new YamlFileLoader($this->configFile);
         $this->config = $loader->load(false);
+
+        // Load nested locales config
+        foreach ($this->getDependentLocales() as $locale) {
+            $this->config = array_merge($locale->getConfig(), $this->config);
+        }
     }
 
     /**
@@ -72,7 +77,7 @@ public function getAuthors(): array
         if (!isset($this->config['authors'])) {
             return [];
         } else {
-            return $this->config['authors'];
+            return (array) $this->config['authors'];
         }
     }
 
@@ -99,7 +104,7 @@ public function getIdentifier(): string
     /**
      * Return the raw configuration data.
      *
-     * @return (array|string)[]
+     * @return string[]
      */
     public function getConfig(): array
     {
@@ -159,7 +164,7 @@ public function getName(): string
     public function getPluralRule(): int
     {
         if (isset($this->config['plural_rule'])) {
-            return $this->config['plural_rule'];
+            return (int) $this->config['plural_rule'];
         } else {
             return 1;
         }
diff --git a/tests/LocaleTest.php b/tests/LocaleTest.php
index 627419f..b4854b3 100644
--- a/tests/LocaleTest.php
+++ b/tests/LocaleTest.php
@@ -18,8 +18,10 @@
 
 class LocaleTest extends TestCase
 {
+    /** @var string */
     protected $basePath;
 
+    /** @var ResourceLocator */
     protected $locator;
 
     public function setUp()
@@ -32,7 +34,7 @@ public function setUp()
         // Add them one at a time to simulate how they are added in SprinkleManager
         $this->locator->registerLocation('core');
         $this->locator->registerLocation('account');
-        $this->locator->registerLocation('admin');
+        $this->locator->registerLocation('fr_CA');
     }
 
     public function testConstructor(): Locale
@@ -137,10 +139,6 @@ public function testGetDetails(Locale $locale): void
         //getDependentLocalesIdentifier
         $this->assertIsArray($locale->getDependentLocalesIdentifier());
         $this->assertSame(['en_US'], $locale->getDependentLocalesIdentifier());
-
-        //getPluralRule
-        $this->assertIsInt($locale->getPluralRule());
-        $this->assertSame(2, $locale->getPluralRule());
     }
 
     /**
@@ -173,6 +171,41 @@ public function testGetPluralRuleWithNoRule(): void
         $this->assertSame(1, $locale->getPluralRule());
     }
 
+    /**
+     * @depends testGetDetails
+     * @depends testGetAuthors
+     */
+    public function testGetDetailsWithInheritance(): void
+    {
+        $locale = new Locale('fr_CA');
+
+        //getName
+        $this->assertIsString($locale->getName());
+        $this->assertSame('French Canadian', $locale->getName());
+
+        //getRegionalName
+        $this->assertIsString($locale->getRegionalName());
+        $this->assertSame('Français Canadien', $locale->getRegionalName());
+
+        //getDependentLocalesIdentifier
+        $this->assertIsArray($locale->getDependentLocalesIdentifier());
+        $this->assertSame(['fr_FR'], $locale->getDependentLocalesIdentifier());
+
+        //getAuthors
+        $this->assertSame(['Foo Bar', 'Bar Foo'], $locale->getAuthors());
+    }
+
+    /**
+     * @depends testConstructorWithNotPath
+     * @depends testGetPluralRule
+     */
+    public function testGetPluralRuleWithInheritance(): void
+    {
+        $locale = new Locale('fr_CA');
+        $this->assertIsInt($locale->getPluralRule());
+        $this->assertSame(2, $locale->getPluralRule());
+    }
+
     /**
      * @depends testConstructor
      * @depends testGetDetails
@@ -184,7 +217,19 @@ public function testGetDependentLocales(Locale $locale): void
         $this->assertInstanceOf(LocaleInterface::class, $result[0]);
     }
 
-    public function testConstructorWithCustomFile()
+    /**
+     * @depends testGetDependentLocales
+     */
+    public function testGetDependentLocalesWithNullParent(): void
+    {
+        $locale = new Locale('es_ES');
+
+        $result = $locale->getDependentLocales();
+        $this->assertIsArray($result);
+        $this->assertEmpty($result);
+    }
+
+    public function testConstructorWithCustomFile(): void
     {
         $locale = new Locale('de_DE', 'locale://de_DE/foo.yaml');
         $this->assertInstanceOf(LocaleInterface::class, $locale);
@@ -199,10 +244,4 @@ public function testConstructorWithCustomFile()
         $this->assertSame(1, $locale->getPluralRule());
         $this->assertSame('de_DE', $locale->getRegionalName());
     }
-
-    /*
-    TODO :
-        - fr_CA
-        - Null Parent
-     */
 }
diff --git a/tests/data/sprinkles/fr_CA/locale/fr_CA/locale.yaml b/tests/data/sprinkles/fr_CA/locale/fr_CA/locale.yaml
index 1aace6a..f1f901b 100644
--- a/tests/data/sprinkles/fr_CA/locale/fr_CA/locale.yaml
+++ b/tests/data/sprinkles/fr_CA/locale/fr_CA/locale.yaml
@@ -1,8 +1,4 @@
 name: French Canadian
 regional: Français Canadien
-authors:
-  - Foo Bar
-  - Bar Foo
-plural_rule: 2
 parents:
   - fr_FR