Building a WordPress site that genuinely supports multiple languages requires more than simply translating text, it requires a technical foundation designed from the start to handle different languages cleanly, both in custom code and in how content is structured and managed. Internationalization, often abbreviated as i18n, refers to this underlying technical preparation, while tools like Polylang provide the practical plugin infrastructure for managing multilingual content.
This guide covers how internationalization works in WordPress and how to implement a multilingual site using Polylang.
What Internationalization Means in WordPress Development
Internationalization refers to the technical practice of writing code in a way that makes it possible to translate a site’s interface and content into different languages without requiring changes to the underlying code itself. In custom WordPress theme and plugin development, this means using WordPress’s built-in translation functions when outputting any text, rather than hardcoding text strings directly, which would make translation far more difficult later.
Why Internationalization Matters for Custom Development
Even if a site only launches in one language initially, building with internationalization in mind from the start makes adding additional languages significantly easier later, without requiring a substantial rework of the underlying theme or plugin code. Retrofitting internationalization into code that wasn’t originally written with translation in mind is considerably more time-consuming than building it in from the beginning.
What Is Polylang
Polylang is a widely used WordPress plugin that adds multilingual functionality, allowing content to be created and managed in multiple languages within a single WordPress installation. It handles much of the practical infrastructure needed for a multilingual site, including language switchers, URL structure for different languages, and linking translated versions of the same piece of content together.
Setting Up Polylang
After installing Polylang, initial setup involves defining which languages the site will support and configuring how language is reflected in the site’s URL structure, whether through separate subdirectories, subdomains, or different domains entirely for each language. This foundational configuration affects both the technical implementation and the site’s SEO structure, so it’s worth planning carefully rather than defaulting to whatever setting seems simplest at first glance.
Translating Content with Polylang
Once configured, Polylang allows content editors to create translated versions of posts and pages directly within the familiar WordPress editing interface, linking each translation to its corresponding version in other languages. This gives content teams a manageable workflow for maintaining multilingual content without needing separate WordPress installations for each language.
Translating Theme and Plugin Strings
Beyond content itself, a fully multilingual site also needs its theme and plugin interface text translated, which is where proper internationalization in the underlying code becomes essential. Polylang integrates with WordPress’s standard translation system, allowing properly internationalized theme and plugin strings to be translated alongside the site’s actual content.
Handling Multilingual SEO
Multilingual sites need careful SEO consideration, including implementing proper language and region tags that tell search engines which version of a page to show to visitors in different locations, and ensuring each language version has its own appropriately translated meta titles and descriptions rather than duplicated content across languages. Polylang provides tools to help manage these technical SEO requirements as part of its broader multilingual functionality.
Managing Media and Custom Fields Across Languages
Multilingual sites need a clear strategy for handling media and custom fields across different language versions, deciding whether images and custom field data should be shared across all languages or translated independently for each one. This decision affects both the content management workflow and how much duplicate content editors need to maintain across different language versions of the site.
Frequently Asked Questions
Is Polylang free to use?
Polylang offers a free version covering core multilingual functionality, along with a premium version that adds additional features such as more advanced e-commerce translation support and other extended capabilities.
Can Polylang be used with WooCommerce?
Yes, Polylang offers dedicated support for translating WooCommerce content, including products and store pages, though this functionality is typically part of Polylang’s premium offering rather than its free version.
Do I need to know how to code to use Polylang?
Basic content translation through Polylang doesn’t require coding knowledge, but ensuring a custom theme or plugin’s interface text is properly translatable does require internationalization work to be built into the underlying code by a developer.
Is Polylang better than WPML for multilingual WordPress sites?
Both are established, capable multilingual plugins with different strengths, and the right choice often depends on specific project requirements, pricing considerations, and developer familiarity with each plugin’s particular implementation approach.
Final Thoughts
Implementing internationalization and Polylang in WordPress allows businesses to genuinely reach multilingual audiences with a well-structured, manageable content workflow rather than a patchwork translation solution. Building with internationalization in mind from the start, particularly for custom-developed themes and plugins, makes expanding into additional languages significantly smoother down the line.
Planning a multilingual WordPress site? Talk to our development team about building it with proper internationalization from the ground up.