diff --git a/Bloxstrap/Resources/Strings.Designer.cs b/Bloxstrap/Resources/Strings.Designer.cs
index e3cc12c..848b724 100644
--- a/Bloxstrap/Resources/Strings.Designer.cs
+++ b/Bloxstrap/Resources/Strings.Designer.cs
@@ -973,6 +973,15 @@ namespace Bloxstrap.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Custom Theme {0}.
+        /// </summary>
+        public static string CustomTheme_DefaultName {
+            get {
+                return ResourceManager.GetString("CustomTheme.DefaultName", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Save changes to {0}?.
         /// </summary>
diff --git a/Bloxstrap/Resources/Strings.resx b/Bloxstrap/Resources/Strings.resx
index db2bd75..f0355ae 100644
--- a/Bloxstrap/Resources/Strings.resx
+++ b/Bloxstrap/Resources/Strings.resx
@@ -1483,4 +1483,8 @@ Defaulting to {1}.</value>
   <data name="CustomTheme.Templates.Simple.MoreExamples" xml:space="preserve">
     <value>Find more custom bootstrapper examples at {0}</value>
   </data>
+  <data name="CustomTheme.DefaultName" xml:space="preserve">
+    <value>Custom Theme {0}</value>
+    <comment>{0} is a string (e.g. '1', '1-1234')</comment>
+  </data>
 </root>
\ No newline at end of file
diff --git a/Bloxstrap/UI/Elements/Dialogs/AddCustomThemeDialog.xaml.cs b/Bloxstrap/UI/Elements/Dialogs/AddCustomThemeDialog.xaml.cs
index d9f9bc4..9d88c8c 100644
--- a/Bloxstrap/UI/Elements/Dialogs/AddCustomThemeDialog.xaml.cs
+++ b/Bloxstrap/UI/Elements/Dialogs/AddCustomThemeDialog.xaml.cs
@@ -39,11 +39,12 @@ namespace Bloxstrap.UI.Elements.Dialogs
         {
             int count = Directory.GetDirectories(Paths.CustomThemes).Count();
 
-            string name = $"Custom Theme {count + 1}";
+            int i = count + 1;
+            string name = string.Format(Strings.CustomTheme_DefaultName, i);
 
             // TODO: this sucks
             if (File.Exists(GetThemePath(name)))
-                name += " " + Random.Shared.Next(1, 100000).ToString(); // easy
+                name = string.Format(Strings.CustomTheme_DefaultName, $"{i}-{Random.Shared.Next(1, 100000)}"); // easy
 
             return name;
         }