diff --git a/EnvelopeGenerator.Web/Middleware/CultureMiddleware.cs b/EnvelopeGenerator.Web/Middleware/CultureMiddleware.cs
index c13e8a10..ea3200e6 100644
--- a/EnvelopeGenerator.Web/Middleware/CultureMiddleware.cs
+++ b/EnvelopeGenerator.Web/Middleware/CultureMiddleware.cs
@@ -24,9 +24,13 @@ public class CultureMiddleware
 
         if (string.IsNullOrEmpty(cookieValue))
         {
-            context.Response.Cookies.SetCulture(_cultures.Default.Language);
-            CultureInfo.CurrentCulture = new CultureInfo(_cultures.Default.Language);
-            CultureInfo.CurrentUICulture = new CultureInfo(_cultures.Default.Language);
+            var requestCulture = context.GetCultureByAcceptLanguage()?.Name;
+            var culture = _cultures.GetOrDefault(requestCulture);
+            var cultureInfo = culture.Info ?? new CultureInfo(culture.Language);
+
+            context.Response.Cookies.SetCulture(culture.Language);
+            CultureInfo.CurrentCulture = cultureInfo;
+            CultureInfo.CurrentUICulture = cultureInfo;
         }
 
         await _next(context);