diff --git a/src/Util/CountryLanguages.php b/src/Util/CountryLanguages.php
index 9369de2..ee10df0 100644
--- a/src/Util/CountryLanguages.php
+++ b/src/Util/CountryLanguages.php
@@ -38,7 +38,7 @@ class CountryLanguages
         'Filipino'
     ];
 
-    public static function fromCountryCode(string $countryCode): string
+    public static function fromCountryCode(string $countryCode): ?string
     {
         $countryLanguages = [
             'US' => 'English (US)',
@@ -85,10 +85,10 @@ class CountryLanguages
             'KE' => 'English', // Also Swahili
         ];
 
-        return $countryLanguages[$countryCode];
+        return $countryLanguages[$countryCode] ?? null;
     }
 
-    public static function fromCountryName(string $countryName): string
+    public static function fromCountryName(string $countryName): ?string
     {
         $countryLanguages = [
             'United States' => 'English (US)',
@@ -135,6 +135,6 @@ class CountryLanguages
             'Kenya' => 'English', // Also Swahili
         ];
 
-        return $countryLanguages[$countryName];
+        return $countryLanguages[$countryName] ?? null;
     }
 }