https://github.com/umbraco/Umbraco-CMS/issues/10927 - Fixed issue with translations but still support the fix for https://github.com/umbraco/Umbraco-CMS/issues/10627

src/Umbraco.Core/Services/LocalizedTextServiceExtensions.cs

@@ -65,7 +65,7 @@ namespace Umbraco.Extensions
              if (text == null)
                  return null;
 
-             if (text.StartsWith("#") == false || text.IndexOf('_') == -1)
+             if (text.StartsWith("#") == false)
                  return text;
 
              text = text.Substring(1);
@@ -75,6 +75,9 @@ namespace Umbraco.Extensions
                  return value;
              }
 
+             if (text.IndexOf('_') == -1)
+                 return text;
+
              var areaAndKey = text.Split('_');
 
              if (areaAndKey.Length < 2)