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hugo/docs/content/en/functions/urls/RelLangURL.md

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---
title: urls.RelLangURL
description: Returns a relative URL with a language prefix, if any.
categories: []
keywords: []
params:
functions_and_methods:
aliases: [relLangURL]
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 your site configuration
- The language prefix, if any
This is the site configuration for the examples that follow:
{{< code-toggle file=hugo >}}
defaultContentLanguage = 'en'
defaultContentLanguageInSubdir = true
[languages.en]
weight = 1
[languages.es]
weight = 2
{{< /code-toggle >}}
## Input does not begin with a slash
If the input does not begin with a slash, the resulting URL will be relative to the `baseURL` in your site configuration.
When rendering the `en` site with `baseURL = https://example.org/`
```go-html-template
{{ relLangURL "" }} → /en/
{{ relLangURL "articles" }} → /en/articles
{{ relLangURL "style.css" }} → /en/style.css
{{ relLangURL "https://example.org" }} → https://example.org
{{ relLangURL "https://example.org/" }} → /en
{{ relLangURL "https://www.example.org" }} → https://www.example.org
{{ relLangURL "https://www.example.org/" }} → https://www.example.org/
```
When rendering the `en` site with `baseURL = https://example.org/docs/`
```go-html-template
{{ relLangURL "" }} → /docs/en/
{{ relLangURL "articles" }} → /docs/en/articles
{{ relLangURL "style.css" }} → /docs/en/style.css
{{ relLangURL "https://example.org" }} → https://example.org
{{ relLangURL "https://example.org/" }} → https://example.org/
{{ relLangURL "https://example.org/docs" }} → https://example.org/docs
{{ relLangURL "https://example.org/docs/" }} → /docs/en
{{ relLangURL "https://www.example.org" }} → https://www.example.org
{{ relLangURL "https://www.example.org/" }} → https://www.example.org/
```
## Input begins with a slash
If the input begins with a slash, the resulting URL will be relative to the protocol+host of the `baseURL` in your site configuration.
When rendering the `en` site with `baseURL = https://example.org/`
```go-html-template
{{ relLangURL "/" }} → /en/
{{ relLangURL "/articles" }} → /en/articles
{{ relLangURL "/style.css" }} → /en/style.css
```
When rendering the `en` site with `baseURL = https://example.org/docs/`
```go-html-template
{{ relLangURL "/" }} → /en/
{{ relLangURL "/articles" }} → /en/articles
{{ relLangURL "/style.css" }} → /en/style.css
```
> [!note]
> As illustrated by the previous example, using a leading slash is rarely desirable and can lead to unexpected outcomes. In nearly all cases, omit the leading slash.