---
title: "Frequently asked questions"
date: 2026-09-12
author: "Claude MCP"
---

# Frequently asked questions

## Do I need a domain for every language?

 No. A language without a domain keeps its language code and is served on the domain of the default site language. You can start with one domain and add others later.

 
## Can two languages share one domain?

 Not as their own domain: one domain belongs to one language. Languages without a domain do live together on the default domain, each with its own language code.

 
## Can I use subdomains?

 Yes. A domain here is simply a host name, so `nl.example.com` works exactly like `www.example.nl`. Search engines treat a country domain as a stronger local signal, but that is an SEO choice, not a technical one.

 
## Do I need a separate Joomla installation per domain?

 No, and that is the point. One installation, one administrator, one set of extensions, several domains.

 
## Is this duplicate content?

 No. Every page exists on exactly one URL, the language code of a domain's own language redirects away permanently, and the hreflang links, the x-default and the canonical all point at the domain of each language.

 
## What happens on my staging domain?

 Nothing at all. A host that is not in your list is left untouched, so staging, `localhost` and an IP address keep working like an ordinary multilingual Joomla site with language codes.

 
## Does it work with the page cache?

 Yes. The URLs are already correct before a page is cached, and Joomla caches per full URL including the host.

 
## Can one language have two domains?

 One language has one domain in the plugin. An extra domain you own - an old name, another extension - is best pointed at the right domain with a permanent redirect in your web server.

 
## What does the free edition include?

 Everything about routing: the language per domain, the redirects, the links between domains, hreflang and the canonical correction. PRO adds a robots.txt per domain, the language suggestion, the domain health check and staying logged in across domains.

 
## Do I need a certificate for every domain?

 Yes, every domain and every www variant needs a valid certificate. The PRO health check warns you two weeks before one expires.

 
## Does it change my URLs in any other way?

 No. Only the language code of the domain's own language disappears; the rest of the URL is built by Joomla and your menu structure exactly as before.