Language Redirect Plugin

WordPress plugin which redirects from the root site of a multisite project to a language specific network site.

Please Note: This plugin doesn’t allow content on the root site! Please read this description carefully to see if this works for you.

The decision which language should be used is based in the browser language of the user which is usually sent as ‘Accept-Language’ header (PHP: $_SERVER[‘HTTP_ACCEPT_LANGUAGE’]).

The plugin provides a configuration page where supported languages, redirect targets and the default language can be configured.

The plugin should be activated only on the root site. It shouldn’t be active on the language specific network site.

The plugin is developed on Github. Feel free to fork the project or create pull requests.

This plugin was originally developed for monkkee and is inspired by oncleben31.cc

1. Upload plugin to the /wp-content/plugins/ directory
2. Activate the plugin through the ‘Plugins’ menu in WordPress
3. Configure plugin (Settings -> Language Redirect)

1. 

   Options

1.0.1

• Handle missing HTTP_ACCEPT_LANGUAGE header, see https://wordpress.org/support/topic/undefined-index-http_accept_language
• Cleanup code concerning WP code conventions

1.0.2

• Consider all languages of HTTP_ACCEPT_LANGUAGE based on their q factor
• Support country based locales like en-US
• Try to match languages prefixes of country based locales as a fallback, e.g. given ‘en-US’ in header and ‘en’ in configuration

1.0.3

• Redirect only if /index.php was invoked. This is the case for all frontend visits.
• Don’t redirect robots.txt
• Delete options when plugin is uninstalled

1.0.4

• Remove buggy robots.txt handling

1.0.5

• Don’t redirect robots.txt