diff --git a/app.php b/app.php
index c61a562d..45ddce71 100644
--- a/app.php
+++ b/app.php
@@ -105,15 +105,7 @@ if (!empty(GROCY_BASE_PATH))
 	$app->setBasePath(GROCY_BASE_PATH);
 }
 
-if (GROCY_MODE === 'production' || GROCY_MODE === 'dev')
-{
-	$app->add(new LocaleMiddleware($container, $app->getResponseFactory()));
-}
-else
-{
-	define('GROCY_LOCALE', GROCY_DEFAULT_LOCALE);
-}
-
+$app->add(new LocaleMiddleware($container, $app->getResponseFactory()));
 $authMiddlewareClass = GROCY_AUTH_CLASS;
 $app->add(new $authMiddlewareClass($container, $app->getResponseFactory()));
 
diff --git a/changelog/82_UNRELEASED_xxxx-xx-xx.md b/changelog/82_UNRELEASED_xxxx-xx-xx.md
index ff3bf3be..131eea1c 100644
--- a/changelog/82_UNRELEASED_xxxx-xx-xx.md
+++ b/changelog/82_UNRELEASED_xxxx-xx-xx.md
@@ -55,6 +55,7 @@
 
 - Fixed accent insensitive searching using the general table search field was broken
 - Fixed that it wasn't possible to log in using passwords containing special escape sequences (e.g. `<<`)
+- Fixed that the initially created location and quantity units weren't localized (only applies to new installations)
 
 ### API
 
diff --git a/config-dist.php b/config-dist.php
index d63e6e93..f5b82e4a 100644
--- a/config-dist.php
+++ b/config-dist.php
@@ -21,6 +21,10 @@ Setting('MODE', 'production');
 
 // The directory name of one of the available localization folders
 // in the "/localization" directory (e.g. "en" or "de")
+// Grocy uses the first available locale / setting in this order
+// 1. Browser prefered locale
+// 2. The one set in user settings
+// 3. The one defined here below
 Setting('DEFAULT_LOCALE', 'en');
 
 // This is used to define the first day of a week for calendar views,
diff --git a/localization/demo_data.pot b/localization/demo_data.pot
index a43cf112..7800898f 100644
--- a/localization/demo_data.pot
+++ b/localization/demo_data.pot
@@ -27,19 +27,6 @@ msgstr ""
 msgid "Tinned food cupboard"
 msgstr ""
 
-msgid "Fridge"
-msgstr ""
-
-msgid "Piece"
-msgid_plural "Pieces"
-msgstr[0] ""
-msgstr[1] ""
-
-msgid "Pack"
-msgid_plural "Packs"
-msgstr[0] ""
-msgstr[1] ""
-
 msgid "Glass"
 msgid_plural "Glasses"
 msgstr[0] ""
diff --git a/localization/strings.pot b/localization/strings.pot
index dc8d22d2..f11687be 100644
--- a/localization/strings.pot
+++ b/localization/strings.pot
@@ -2473,3 +2473,19 @@ msgstr ""
 
 msgid "After this product was once in stock and when the desired quantity unit cannot be selected here, first create a corresponding unit conversion"
 msgstr ""
+
+# Default / initially created location
+msgid "Fridge"
+msgstr ""
+
+# Default / initially created quantity unit
+msgid "Piece"
+msgid_plural "Pieces"
+msgstr[0] ""
+msgstr[1] ""
+
+# Default / initially created quantity unit
+msgid "Pack"
+msgid_plural "Packs"
+msgstr[0] ""
+msgstr[1] ""
diff --git a/middleware/LocaleMiddleware.php b/middleware/LocaleMiddleware.php
index 5f20c0e5..94271f54 100644
--- a/middleware/LocaleMiddleware.php
+++ b/middleware/LocaleMiddleware.php
@@ -11,16 +11,24 @@ class LocaleMiddleware extends BaseMiddleware
 {
 	public function __invoke(Request $request, RequestHandler $handler): Response
 	{
-		$locale = $this->getLocale($request);
-		define('GROCY_LOCALE', $locale);
+		define('GROCY_LOCALE', $this->GetLocale($request));
+
 		return $handler->handle($request);
 	}
 
-	protected function getLocale(Request $request)
+	private function GetLocale(Request $request)
 	{
+		// demo and prerelease modes are fixed to the default locale
+		if (GROCY_MODE === 'demo' || GROCY_MODE === 'prerelease')
+		{
+			return GROCY_DEFAULT_LOCALE;
+		}
+
+		// Prefer user setting
 		if (defined('GROCY_AUTHENTICATED') && GROCY_AUTHENTICATED)
 		{
 			$locale = UsersService::GetInstance()->GetUserSetting(GROCY_USER_ID, 'locale');
+
 			if (isset($locale) && !empty($locale))
 			{
 				if (in_array($locale, scandir(__DIR__ . '/../localization')))
@@ -30,11 +38,9 @@ class LocaleMiddleware extends BaseMiddleware
 			}
 		}
 
-		$langs = implode(',', $request->getHeader('Accept-Language'));
-
-		// Src: https://gist.github.com/spolischook/0cde9c6286415cddc088
-		$prefLocales = array_reduce(
-			explode(',', $langs),
+		// Otherwise use Browser prefered locale
+		$browserPreferedLocales = array_reduce(
+			explode(',', implode(',', $request->getHeader('Accept-Language'))),
 			function ($res, $el)
 			{
 				list($l, $q) = array_merge(explode(';q=', $el), [1]);
@@ -43,10 +49,10 @@ class LocaleMiddleware extends BaseMiddleware
 			},
 			[]
 		);
-		arsort($prefLocales);
+		arsort($browserPreferedLocales);
 
 		$availableLocales = scandir(__DIR__ . '/../localization');
-		foreach ($prefLocales as $locale => $q)
+		foreach ($browserPreferedLocales as $locale => $q)
 		{
 			if (in_array($locale, $availableLocales))
 			{
@@ -66,6 +72,7 @@ class LocaleMiddleware extends BaseMiddleware
 			}
 		}
 
+		// Falback to default locale
 		return GROCY_DEFAULT_LOCALE;
 	}
 }
diff --git a/services/DatabaseMigrationService.php b/services/DatabaseMigrationService.php
index 0fd19eb5..86ffe164 100644
--- a/services/DatabaseMigrationService.php
+++ b/services/DatabaseMigrationService.php
@@ -12,8 +12,6 @@ class DatabaseMigrationService extends BaseService
 
 	public function MigrateDatabase()
 	{
-		define('GROCY_DATABASE_MIGRATIONS_RUNNING', true);
-
 		DatabaseService::GetInstance()->ExecuteDbStatement("CREATE TABLE IF NOT EXISTS migrations (migration INTEGER NOT NULL PRIMARY KEY UNIQUE, execution_time_timestamp DATETIME DEFAULT (datetime('now', 'localtime')))");
 
 		$migrationFiles = [];
diff --git a/services/LocalizationService.php b/services/LocalizationService.php
index 22ac79a4..bd133a45 100644
--- a/services/LocalizationService.php
+++ b/services/LocalizationService.php
@@ -8,12 +8,12 @@ use Gettext\Translator;
 
 class LocalizationService extends BaseService
 {
-	public function __construct(string $culture)
+	public function __construct(string $locale)
 	{
 		parent::__construct();
 
-		$this->Culture = $culture;
-		$this->LoadLocalizations($culture);
+		$this->Locale = $locale;
+		$this->LoadLocalizations($locale);
 	}
 
 	protected $Po;
@@ -22,8 +22,8 @@ class LocalizationService extends BaseService
 	protected $PotMain;
 	protected $Translator;
 	protected $TranslatorQu;
-	protected $Culture;
-	private static $instanceMap = [];
+	protected $Locale;
+	private static $InstanceMap = [];
 
 	public function CheckAndAddMissingTranslationToPot($text)
 	{
@@ -112,31 +112,24 @@ class LocalizationService extends BaseService
 		}
 	}
 
-	public static function GetInstance(string $culture = '')
+	public static function GetInstance(string $locale = '')
 	{
-		if (empty($culture))
+		if (empty($locale))
 		{
-			if (defined('GROCY_LOCALE'))
-			{
-				$culture = GROCY_LOCALE;
-			}
-			else
-			{
-				$culture = GROCY_DEFAULT_LOCALE;
-			}
+			$locale = GROCY_LOCALE;
 		}
 
-		if (!in_array($culture, self::$instanceMap))
+		if (!in_array($locale, self::$InstanceMap))
 		{
-			self::$instanceMap[$culture] = new self($culture);
+			self::$InstanceMap[$locale] = new self($locale);
 		}
 
-		return self::$instanceMap[$culture];
+		return self::$InstanceMap[$locale];
 	}
 
 	private function LoadLocalizations()
 	{
-		$culture = $this->Culture;
+		$locale = $this->Locale;
 
 		if (GROCY_MODE === 'dev')
 		{
@@ -153,47 +146,46 @@ class LocalizationService extends BaseService
 			$this->Pot = $this->Pot->mergeWith(Translations::fromPoFile(__DIR__ . '/../localization/demo_data.pot'));
 		}
 
-		$this->Po = Translations::fromPoFile(__DIR__ . "/../localization/$culture/strings.po");
+		$this->Po = Translations::fromPoFile(__DIR__ . "/../localization/$locale/strings.po");
 
-		if (file_exists(__DIR__ . "/../localization/$culture/chore_assignment_types.po"))
+		if (file_exists(__DIR__ . "/../localization/$locale/chore_assignment_types.po"))
 		{
-			$this->Po = $this->Po->mergeWith(Translations::fromPoFile(__DIR__ . "/../localization/$culture/chore_assignment_types.po"));
+			$this->Po = $this->Po->mergeWith(Translations::fromPoFile(__DIR__ . "/../localization/$locale/chore_assignment_types.po"));
 		}
 
-		if (file_exists(__DIR__ . "/../localization/$culture/component_translations.po"))
+		if (file_exists(__DIR__ . "/../localization/$locale/component_translations.po"))
 		{
-			$this->Po = $this->Po->mergeWith(Translations::fromPoFile(__DIR__ . "/../localization/$culture/component_translations.po"));
+			$this->Po = $this->Po->mergeWith(Translations::fromPoFile(__DIR__ . "/../localization/$locale/component_translations.po"));
 		}
 
-		if (file_exists(__DIR__ . "/../localization/$culture/stock_transaction_types.po"))
+		if (file_exists(__DIR__ . "/../localization/$locale/stock_transaction_types.po"))
 		{
-			$this->Po = $this->Po->mergeWith(Translations::fromPoFile(__DIR__ . "/../localization/$culture/stock_transaction_types.po"));
+			$this->Po = $this->Po->mergeWith(Translations::fromPoFile(__DIR__ . "/../localization/$locale/stock_transaction_types.po"));
 		}
 
-		if (file_exists(__DIR__ . "/../localization/$culture/chore_period_types.po"))
+		if (file_exists(__DIR__ . "/../localization/$locale/chore_period_types.po"))
 		{
-			$this->Po = $this->Po->mergeWith(Translations::fromPoFile(__DIR__ . "/../localization/$culture/chore_period_types.po"));
+			$this->Po = $this->Po->mergeWith(Translations::fromPoFile(__DIR__ . "/../localization/$locale/chore_period_types.po"));
 		}
 
-		if (file_exists(__DIR__ . "/../localization/$culture/userfield_types.po"))
+		if (file_exists(__DIR__ . "/../localization/$locale/userfield_types.po"))
 		{
-			$this->Po = $this->Po->mergeWith(Translations::fromPoFile(__DIR__ . "/../localization/$culture/userfield_types.po"));
+			$this->Po = $this->Po->mergeWith(Translations::fromPoFile(__DIR__ . "/../localization/$locale/userfield_types.po"));
 		}
 
-		if (file_exists(__DIR__ . "/../localization/$culture/permissions.po"))
+		if (file_exists(__DIR__ . "/../localization/$locale/permissions.po"))
 		{
-			$this->Po = $this->Po->mergeWith(Translations::fromPoFile(__DIR__ . "/../localization/$culture/permissions.po"));
+			$this->Po = $this->Po->mergeWith(Translations::fromPoFile(__DIR__ . "/../localization/$locale/permissions.po"));
 		}
 
-		if (file_exists(__DIR__ . "/../localization/$culture/locales.po"))
+		if (file_exists(__DIR__ . "/../localization/$locale/locales.po"))
 		{
-			$this->Po = $this->Po->mergeWith(Translations::fromPoFile(__DIR__ . "/../localization/$culture/locales.po"));
+			$this->Po = $this->Po->mergeWith(Translations::fromPoFile(__DIR__ . "/../localization/$locale/locales.po"));
 		}
 
-		// Load demo data localizations also during database migrations since e.g. default quantity units are created localized by that
-		if ((GROCY_MODE !== 'production' || defined('GROCY_DATABASE_MIGRATIONS_RUNNING')) && file_exists(__DIR__ . "/../localization/$culture/demo_data.po"))
+		if (GROCY_MODE !== 'production' && file_exists(__DIR__ . "/../localization/$locale/demo_data.po"))
 		{
-			$this->Po = $this->Po->mergeWith(Translations::fromPoFile(__DIR__ . "/../localization/$culture/demo_data.po"));
+			$this->Po = $this->Po->mergeWith(Translations::fromPoFile(__DIR__ . "/../localization/$locale/demo_data.po"));
 		}
 
 		$this->Translator = new Translator();