hugo/content/functions/relLangURL.md

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title	description	godocref	date	publishdate	lastmod	tags	categories	menu	ns	signature	workson	hugoversion	relatedfuncs	deprecated	aliases	needsexamples
rellangurl	Adds the relative URL with correct language prefix according to site configuration for multilingual.		2017-02-01	2017-02-01	2017-02-01	multilingual i18n urls	functions	docs parent functions		relLangURL INPUT				false		true

absLangURL and relLangURL functions are similar to their absURL and relURL relatives but will add the correct language prefix when the site is configured with more than one language. (See Configuring Multilingual.)

So for a site baseURL set to http://yoursite.com/hugo/ and the current language is en:

{{ "blog/" | absLangURL }} → "http://yoursite.com/hugo/en/blog/"
{{ "blog/" | relLangURL }} → "/hugo/en/blog/"