diff --git a/EnvelopeGenerator.Web/Controllers/Test/TestLocalizerController.cs b/EnvelopeGenerator.Web/Controllers/Test/TestLocalizerController.cs
index b6c09b14..5e63e217 100644
--- a/EnvelopeGenerator.Web/Controllers/Test/TestLocalizerController.cs
+++ b/EnvelopeGenerator.Web/Controllers/Test/TestLocalizerController.cs
@@ -23,8 +23,8 @@ namespace EnvelopeGenerator.Web.Controllers.Test
             _cultures = cultures;
         }
 
-        [HttpGet]
-        public IActionResult Localize([FromQuery] string key = "de_DE") => Ok(_localizer[key]);
+        [HttpGet("{key}")]
+        public IActionResult Localize([FromRoute] string key) => Ok(_localizer[key]);
 
         [HttpGet("fi-class")]
         public IActionResult GetFIClass(string? lang = null) => lang is null ? Ok(_cultures.FIClasses) : Ok(_cultures[lang]?.FIClass);