Merge commit '9b0050e9aabe4be65c78ccf292a348f309d50ccd' as 'docs'

```
git subtree add --prefix=docs/ https://github.com/gohugoio/hugoDocs.git master --squash
```

Closes #11925

docs/content/en/methods/menu-entry/KeyName.md

@@ -0,0 +1,39 @@
+---
+title: KeyName
+description: Returns the `identifier` property of the given menu entry, falling back to its `name` property. 
+categories: []
+keywords: []
+action:
+  related: []
+  returnType: string
+  signatures: [MENUENTRY.KeyName]
+---
+
+In this menu definition, the second entry does not contain an `identifier`, so the `Identifier` method returns its `name` property instead:
+
+{{< code-toggle file=hugo >}}
+[[menus.main]]
+identifier = 'about'
+name = 'About'
+pageRef = '/about'
+weight = 10
+
+[[menus.main]]
+name = 'Contact'
+pageRef = '/contact'
+weight = 20
+{{< /code-toggle >}}
+
+This example uses the `KeyName` method when querying the translation table on a multilingual site, falling back the `name` property if a matching key in the translation table does not exist:
+
+```go-html-template
+<ul>
+  {{ range .Site.Menus.main }}
+    <li><a href="{{ .URL }}">{{ or (T (.KeyName | lower)) .Name }}</a></li>
+  {{ end }}
+</ul>
+```
+
+In the example above, we need to pass the value returned by `.KeyName` through the [`lower`] function because the keys in the translation table are lowercase.
+
+[`lower`]: functions/strings/tolower