Alt text for multilingual WordPress sites
Multilingual WordPress sites add a layer of complexity to every content workflow, and image alt text is no exception. A site available in English and French needs alt text that works in both languages — not just for SEO in each language's search results, but for accessibility for speakers of each language.
The question most multilingual publishers ask is: does my alt text plugin handle translations? The answer depends on how the plugin generates alt text and how the translation plugin structures content.
How multilingual plugins structure content
WPML and Polylang — the two most widely used multilingual plugins for WordPress — handle translations differently but share a common principle: each translation of a post or product is either a separate database entry or a linked variant with its own metadata.
When you translate a blog post from English to French in WPML, the French version is a separate post with its own title, content, featured image assignment, and — crucially — its own focus keyword if you use Yoast, Rank Math, or AIOSEO. The same applies to WooCommerce products: a translated product page has its own product title and SEO metadata.
This is good news for Bialty, because it means the contextual signals are language-specific by design.
How Bialty works on translated pages
Bialty reads contextual signals — focus keyword, post title, or image name — from the current post being rendered. On a multilingual site, when the French version of a page is loaded, the current post is the French translation. The title is in French, the focus keyword (if set) is in French, and Bialty injects the French signal as alt text.
No special configuration is needed. Bialty does not know or care whether the site is multilingual. It reads from the post being rendered, and on a properly configured multilingual site, the post being rendered is the correct language version.
This means the alt text language follows the page language automatically. English pages get English alt text from English metadata. French pages get French alt text from French metadata. The condition is that the translation must have its own metadata — a title and ideally a focus keyword — set in the target language.
What to verify on a multilingual site
The most common issue is not a Bialty problem but a metadata problem. Translations that copy the English title without actually translating it, or translations where the focus keyword field is left empty in the target language, will produce English alt text (or empty alt text) on the translated page.
Before deploying Bialty on a multilingual site, check a sample of translated pages and verify that the post title is actually translated (not just copied from the source language), the focus keyword in the SEO plugin is set in the target language, and the rendered frontend HTML shows alt text in the correct language.
If the focus keyword is empty on translations but the title is translated, configure Bialty to use the post title as the signal source for those content types. Titles are almost always translated; focus keywords sometimes are not.
Image sharing across translations
Some multilingual configurations share the same images across translations. The French version of a post uses the same physical image file as the English version. This is fine for Bialty because the alt text is injected at render time, not stored in the image metadata. The same image file can have an English alt text on the English page and a French alt text on the French page. The dynamic injection model handles this naturally.
This is actually a significant advantage over plugins that write alt text into the Media Library. A stored alt text value is language-neutral — it is the same regardless of which translation is loading the image. A dynamic injection pulls from the current page context, which is language-specific.
WooCommerce with multilingual
Multilingual WooCommerce stores (typically using WPML's WooCommerce Multilingual extension) create separate product entries for each language. Each translated product has its own title and metadata. Bialty's WooCommerce support works the same way on translated products as on original-language products — it reads the current product's signals and injects accordingly.
Validate product pages in each language separately: main product image, gallery images, and related products. Verify that the theme renders product images consistently across language versions, as some multilingual theme integrations can alter template behavior.
Languages beyond WPML and Polylang
Bialty does not depend on any specific multilingual plugin. It reads from WordPress's standard post metadata API. Any translation system that creates proper post entries with their own metadata — TranslatePress, MultilingualPress, or custom implementations — will work the same way.
The key requirement is that the translated post must have its own title and (ideally) its own focus keyword in the target language. If those exist, Bialty produces language-correct alt text automatically.
The image name signal on multilingual sites
One edge case to consider: if you use image filename as the alt text signal, the filename is the same across all language versions (since the physical file is shared). An image named wooden-deck-restoration.jpg produces the English alt text "Wooden Deck Restoration" on both the English and French pages.
For multilingual sites where the image name signal is important, this is a limitation. The workaround is to prefer the post title or focus keyword as the signal on multilingual sites, since those are properly translated. Reserve the image name signal for monolingual sites or as a fallback when other signals are unavailable.
The bottom line
Multilingual alt text is a metadata completeness problem, not a plugin compatibility problem. If the translated pages have properly translated titles and focus keywords, Bialty produces the correct alt text in the correct language automatically. Verify the metadata, then verify the frontend — the same troubleshooting workflow applies in every language.