diff --git a/.gitignore b/.gitignore
index 3ee90a37..7482310e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,6 +26,7 @@ _vimrc_local.vim
 
 # Project files
 /config/config.php
+/config/lang/
 /test/coverage
 /public/coverage
 /coverage
diff --git a/src/Helpers/Translation/TranslationServiceProvider.php b/src/Helpers/Translation/TranslationServiceProvider.php
index 097d54d4..fb4cb5df 100644
--- a/src/Helpers/Translation/TranslationServiceProvider.php
+++ b/src/Helpers/Translation/TranslationServiceProvider.php
@@ -8,6 +8,7 @@ use Engelsystem\Http\Request;
 use Gettext\Loader\MoLoader;
 use Gettext\Loader\PoLoader;
 use Gettext\Translations;
+use Illuminate\Contracts\Container\BindingResolutionException;
 use Illuminate\Support\Str;
 use Symfony\Component\HttpFoundation\Session\Session;
 
@@ -74,19 +75,15 @@ class TranslationServiceProvider extends ServiceProvider
 
             /** @var Translations $translations */
             $translations = $this->app->call([Translations::class, 'create']);
+            $path = $this->app->get('path.lang');
             foreach ($names as $name) {
-                $file = $this->getFile($locale, $name);
-                if (Str::endsWith($file, '.mo')) {
-                    /** @var MoLoader $loader */
-                    $loader = $this->app->make(MoLoader::class);
-                } else {
-                    /** @var PoLoader $loader */
-                    $loader = $this->app->make(PoLoader::class);
-                }
-
-                $translations = $loader->loadFile($file, $translations);
+                $file = $this->getFile($locale, $path, $name);
+                $translations = $this->loadFile($file, $translations);
             }
 
+            $file = $this->getFile($locale, $this->app->get('path.config') . '/lang', 'custom');
+            $translations = $this->loadFile($file, $translations);
+
             $translator = GettextTranslator::createFromTranslations($translations);
             $this->translators[$locale] = $translator;
         }
@@ -94,9 +91,20 @@ class TranslationServiceProvider extends ServiceProvider
         return $this->translators[$locale];
     }
 
-    protected function getFile(string $locale, string $name = 'default'): string
+    protected function loadFile(string $file, Translations $translations): Translations
     {
-        $filepath = $file = $this->app->get('path.lang') . '/' . $locale . '/' . $name;
+        if (!file_exists($file)) {
+            return $translations;
+        }
+
+        $loader = $this->getFileLoader($file);
+
+        return $loader->loadFile($file, $translations);
+    }
+
+    protected function getFile(string $locale, string $basePath, string $name = 'default'): string
+    {
+        $filepath = $basePath . '/' . $locale . '/' . $name;
         $file = $filepath . '.mo';
 
         if (!file_exists($file)) {
@@ -105,4 +113,18 @@ class TranslationServiceProvider extends ServiceProvider
 
         return $file;
     }
+
+    /**
+     * @throws BindingResolutionException
+     */
+    protected function getFileLoader(string $file): MoLoader|PoLoader
+    {
+        if (Str::endsWith($file, '.mo')) {
+            /** @var MoLoader $loader */
+            return $this->app->make(MoLoader::class);
+        } else {
+            /** @var PoLoader $loader */
+            return $this->app->make(PoLoader::class);
+        }
+    }
 }
diff --git a/tests/Unit/Helpers/Translation/Assets/ba_RR/additional.po b/tests/Unit/Helpers/Translation/Assets/ba_RR/additional.po
index 72383947..dd0f99c7 100644
--- a/tests/Unit/Helpers/Translation/Assets/ba_RR/additional.po
+++ b/tests/Unit/Helpers/Translation/Assets/ba_RR/additional.po
@@ -1,3 +1,9 @@
 # Testing content
 msgid "validation.foo.bar"
 msgstr "B Arr required!"
+
+msgid "msg.additional"
+msgstr "Additional"
+
+msgid "msg.overwritten"
+msgstr "From additional"
diff --git a/tests/Unit/Helpers/Translation/Assets/ba_RR/default.po b/tests/Unit/Helpers/Translation/Assets/ba_RR/default.po
index 887e2daa..8fd7138a 100644
--- a/tests/Unit/Helpers/Translation/Assets/ba_RR/default.po
+++ b/tests/Unit/Helpers/Translation/Assets/ba_RR/default.po
@@ -1,3 +1,9 @@
 # Testing content
 msgid "foo.bar"
 msgstr "B Arr!"
+
+msgid "msg.default"
+msgstr "Default"
+
+msgid "msg.overwritten"
+msgstr "From default"
diff --git a/tests/Unit/Helpers/Translation/Assets/config/lang/ba_RR/custom.po b/tests/Unit/Helpers/Translation/Assets/config/lang/ba_RR/custom.po
new file mode 100644
index 00000000..c0a0c3ad
--- /dev/null
+++ b/tests/Unit/Helpers/Translation/Assets/config/lang/ba_RR/custom.po
@@ -0,0 +1,8 @@
+msgid "msg.default"
+msgstr "Custom default"
+
+msgid "msg.additional"
+msgstr "Custom additional"
+
+msgid "msg.overwritten"
+msgstr "Custom overwritten"
diff --git a/tests/Unit/Helpers/Translation/TranslationServiceProviderTest.php b/tests/Unit/Helpers/Translation/TranslationServiceProviderTest.php
index 8d63d3e0..85d21ce0 100644
--- a/tests/Unit/Helpers/Translation/TranslationServiceProviderTest.php
+++ b/tests/Unit/Helpers/Translation/TranslationServiceProviderTest.php
@@ -2,13 +2,13 @@
 
 namespace Engelsystem\Test\Unit\Helpers\Translation;
 
+use Engelsystem\Application;
 use Engelsystem\Config\Config;
 use Engelsystem\Helpers\Translation\TranslationServiceProvider;
 use Engelsystem\Helpers\Translation\Translator;
 use Engelsystem\Http\Request;
 use Engelsystem\Test\Unit\ServiceProviderTest;
 use PHPUnit\Framework\MockObject\MockObject;
-use PHPUnit\Framework\MockObject\Rule\InvokedCount;
 use Symfony\Component\HttpFoundation\Session\Session;
 
 class TranslationServiceProviderTest extends ServiceProviderTest
@@ -79,13 +79,15 @@ class TranslationServiceProviderTest extends ServiceProviderTest
 
     /**
      * @covers \Engelsystem\Helpers\Translation\TranslationServiceProvider::getTranslator
+     * @covers \Engelsystem\Helpers\Translation\TranslationServiceProvider::getFile
+     * @covers \Engelsystem\Helpers\Translation\TranslationServiceProvider::getFileLoader
+     * @covers \Engelsystem\Helpers\Translation\TranslationServiceProvider::loadFile
      */
     public function testGetTranslator(): void
     {
-        $app = $this->getApp(['get']);
-        $serviceProvider = new TranslationServiceProvider($app);
+        $app = $this->getConfiguredApp();
 
-        $this->setExpects($app, 'get', ['path.lang'], __DIR__ . '/Assets', new InvokedCount(2));
+        $serviceProvider = new TranslationServiceProvider($app);
 
         // Get translator
         $translator = $serviceProvider->getTranslator('fo_OO');
@@ -99,11 +101,12 @@ class TranslationServiceProviderTest extends ServiceProviderTest
     /**
      * @covers \Engelsystem\Helpers\Translation\TranslationServiceProvider::getTranslator
      * @covers \Engelsystem\Helpers\Translation\TranslationServiceProvider::getFile
+     * @covers \Engelsystem\Helpers\Translation\TranslationServiceProvider::getFileLoader
+     * @covers \Engelsystem\Helpers\Translation\TranslationServiceProvider::loadFile
      */
     public function testGetTranslatorFromPo(): void
     {
-        $app = $this->getApp(['get']);
-        $this->setExpects($app, 'get', ['path.lang'], __DIR__ . '/Assets', new InvokedCount(2));
+        $app = $this->getConfiguredApp();
 
         $serviceProvider = new TranslationServiceProvider($app);
 
@@ -112,4 +115,31 @@ class TranslationServiceProviderTest extends ServiceProviderTest
         $this->assertEquals('B Arr!', $translator->gettext('foo.bar'));
         $this->assertEquals('B Arr required!', $translator->gettext('validation.foo.bar'));
     }
+
+    /**
+     * @covers \Engelsystem\Helpers\Translation\TranslationServiceProvider::getTranslator
+     */
+    public function testGetTranslatorCustom(): void
+    {
+        $app = $this->getConfiguredApp();
+
+        $serviceProvider = new TranslationServiceProvider($app);
+
+        // Get translation from the custom.po file
+        $translator = $serviceProvider->getTranslator('ba_RR');
+        $this->assertEquals('Custom default', $translator->gettext('msg.default'));
+        $this->assertEquals('Custom additional', $translator->gettext('msg.additional'));
+        $this->assertEquals('Custom overwritten', $translator->gettext('msg.overwritten'));
+    }
+
+    private function getConfiguredApp(): Application|MockObject
+    {
+        $app = $this->getApp(['get']);
+        $app->expects($this->exactly(2))
+            ->method('get')
+            ->withConsecutive(['path.lang'], ['path.config'])
+            ->willReturn(__DIR__ . '/Assets', __DIR__ . '/Assets/config');
+
+        return $app;
+    }
 }