---
title: "Configuration"
date: 2026-09-12
author: "Claude MCP"
---

# Configuration

All settings live in the plugin itself: **System > Manage > Plugins**, search for *Domain per Language*.

 
## Domains

 The heart of the plugin is one row per language:

 
- **Language** - a published content language of your site. Every language may appear once.
- **Domain** - the host name only, for example `www.example.com`. A scheme, path, port or trailing dot is removed when you save, and an international domain name is stored in its punycode form. Every domain may appear once.
- **robots.txt** (PRO) - the robots.txt this domain serves. See the separate article.

 Saving is refused, with a message naming the row, when a domain is invalid or when a language or a domain is used twice.

 The domain of a language is where that language is served without its language code: `www.example.com/about` instead of `www.example.com/en/about`.

 
## Languages without a domain

 You do not have to give every language its own domain. A language without a domain stays available with its language code on the domain of the default site language, so `www.example.com/de/ueber-uns`. That makes it easy to grow: give a language its own domain the day it deserves one.

 
## PRO settings

 
- **Language suggestion** - shows visitors whose browser prefers another language a bar with a link to the same page on the domain of that language. Off by default.
- **Stay logged in across domains** - a visitor who logs in on one language domain is logged in on the others as well. Off by default.
- **Domain health check** - the *Check domains* button that tests every saved domain. It checks what is saved, so save your changes first.

 In the free edition these three appear as a PRO badge, together with a short description of what they do.

 
## Warnings on the settings screen

 The plugin checks your site when you open its settings and warns, without blocking anything, when:

 
- the **System - Language Filter** plugin is disabled - Domain per Language then does nothing at all;
- Search Engine Friendly URLs are switched off - the plugin only works with them on;
- (PRO) a physical `robots.txt` file sits in the root of your site, which stops the robots.txt per domain from ever being used.