---
title: urls.RelLangURL
description: Returns a relative URL with a language prefix, if any.
categories: []
keywords: []
action:
  aliases: [relLangURL]
  related:
    - functions/urls/AbsLangURL
    - functions/urls/AbsURL 
    - functions/urls/RelURL
  returnType: string
  signatures: [urls.RelLangURL INPUT]
aliases: [/functions/rellangurl]
---

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
{{ relLangURL "" }}           →   /en/
{{ relLangURL "articles" }}   →   /en/articles
{{ relLangURL "style.css" }}  →   /en/style.css
```

With `baseURL = https://example.org/docs/`

```go-html-template
{{ relLangURL "" }}           →   /docs/en/
{{ relLangURL "articles" }}   →   /docs/en/articles
{{ relLangURL "style.css" }}  →   /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
{{ relLangURL "/" }}          →   /en/
{{ relLangURL "/articles" }}  →   /en/articles
{{ relLangURL "/style.css" }} →   /en/style.css
```

With `baseURL = https://example.org/docs/`

```go-html-template
{{ relLangURL "/" }}          →   /en/
{{ relLangURL "/articles" }}  →   /en/articles
{{ relLangURL "/style.css" }} →   /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 %}}