Merge commit '9b0050e9aabe4be65c78ccf292a348f309d50ccd' as 'docs'

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

Closes #11925

docs/content/en/functions/urls/AbsLangURL.md

@@ -0,0 +1,67 @@
+---
+title: urls.AbsLangURL
+description: Returns an absolute URL with a language prefix, if any.
+categories: []
+keywords: []
+action:
+  aliases: [absLangURL]
+  related:
+    - functions/urls/AbsURL 
+    - functions/urls/RelLangURL
+    - functions/urls/RelURL
+  returnType: string
+  signatures: [urls.AbsLangURL INPUT]
+aliases: [/functions/abslangurl]
+---
+
+Use this function with both monolingual and multilingual configurations. The URL returned by this function depends on:
+
+- Whether the input begins with a slash
+- The `baseURL` in site configuration
+- The language prefix, if any
+
+In examples that follow, the project is multilingual with content in both Español (`es`) and English (`en`). The default language is Español. The returned values are from the English site.
+
+### Input does not begin with a slash
+
+If the input does not begin with a slash, the resulting URL will be correct regardless of the `baseURL`.
+
+With `baseURL = https://example.org/`
+
+```go-html-template
+{{ absLangURL "" }}           →   https://example.org/en/
+{{ absLangURL "articles" }}   →   https://example.org/en/articles
+{{ absLangURL "style.css" }}  →   https://example.org/en/style.css
+```
+
+With `baseURL = https://example.org/docs/`
+
+```go-html-template
+{{ absLangURL "" }}           →   https://example.org/docs/en/
+{{ absLangURL "articles" }}   →   https://example.org/docs/en/articles
+{{ absLangURL "style.css" }}  →   https://example.org/docs/en/style.css
+```
+
+### Input begins with a slash
+
+If the input begins with a slash, the resulting URL will be incorrect when the `baseURL` includes a subdirectory. With a leading slash, the function returns a URL relative to the protocol+host section of the `baseURL`.
+
+With `baseURL = https://example.org/`
+
+```go-html-template
+{{ absLangURL "/" }}          →   https://example.org/en/
+{{ absLangURL "/articles" }}  →   https://example.org/en/articles
+{{ absLangURL "/style.css" }} →   https://example.org/en/style.css
+```
+
+With `baseURL = https://example.org/docs/`
+
+```go-html-template
+{{ absLangURL "/" }}          →   https://example.org/en/
+{{ absLangURL "/articles" }}  →   https://example.org/en/articles
+{{ absLangURL "/style.css" }} →   https://example.org/en/style.css
+```
+
+{{% note %}}
+The last three examples are not desirable in most situations. As a best practice, never include a leading slash when using this function.
+{{% /note %}}