November 06, 2025

Why multilingual SEO is essential in the AI era

Do you want your website to be quoted by AI systems? Does it need to be visible to users in multiple languages? If you answer 'yes' to both questions, then multilingual SEO is for you! In fact, recent research by Weglot shows that websites with multilingual content are much more likely to be cited by AI listings and major language models (LLMs) such as ChatGPT and thus also score better on AEO and GEO. So what's still holding you back? Find out even more about the importance of your website's multilingual SEO in our blog.

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What does the Weglot establish?

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Weglot examined how language versions affect a site's visibility. Here are the most striking insights:

  • Multilingual websites score much more consistently: websites with both English and Spanish versions achieve an average of 10,046 mentions for English and 8,048 mentions for Spanish. This ensures almost equal visibility in both languages.
  • On average you get 24% more visibility by a translation and in some cases the reach can even increase by 327% in the second language.
  • With a multilingual website, the language bias in AI tools such as ChatGPT is greatly reduced, which increases your visibility and reach.

What does this mean specifically for your website or web shop?

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If your target audience speaks multiple languages or lives in different countries, you can no longer avoid multilingualism. A website that is only available in one language loses visibility. LLMs such as ChatGPT and Google Gemini prefer prefer content in the user's language. These models determine what information is visible in search results, summaries and through voice assistants. In short: setting up multiple languages provides free visibility, a good AEO and GEO, even before you start advertising or working on your SEO.

How does this work?

Multilingual SEO is more than just text conversion. It also involves the following elements on your website:

  • Dedicated language URLs (e.g. /en/, /fr/) or subdomains.
  • Automatic hreflang tags, so search engines and AI know which language version is for whom.
  • Metadata, alt tags and the structure of your site are translated so that even bots and AI find the correct language version.

If you don't follow through on these steps, you run the risk of misindexing or missed opportunities for AI visibility. But hey, no worries! You don't have to do this all by yourself. Tools like Weglot can help you with this.

Why we at Tunity choose Weglot

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At Tunity, we deliberately chose Weglot as a partner for translation needs because the tool makes it possible to set up multilingualism at lightning speed. And also for these benefits:

  • Scoring on SEO, AEO and GEO: Weglot automatically sets up language URLs, hreflang tags and metadata translation, making your site instantly more findable by search engines and AI systems.
  • AI-assisted, but with human finesse: the machine translations are done quickly, but you always have the option to customize the content for a consistent style, tone-of-voice and brand identity.
  • Official partner: as a Weglot, we guide you through the implementation, optimization and maintenance of your multilingual site.

Checklist for multilingual SEO

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With this short checklist, you can successfully make your website multilingual: 

  1. Determine relevant languages: analyze which countries/regions your visitors already have or want to reach.
  2. Install Weglot and define the language versions.
  3. Check technical SEO basics for each language version: correct URLs, hreflang, metadata (title, meta description).
  4. Automatically translate content, but adjust where necessary (local language, cultural nuance, tone of voice).
  5. Monitor performance by language version: traffic, engagement, conversion.
  6. Keep translations up-to-date: as soon as you publish new content, make sure the multilingual versions follow. With a tool like Weglot , this is done completely automatically.
  7. Optimize continuously: see which languages yield the most, where the biggest improvements can be made.

Need help translating your website?

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Want to prepare your website for international visibility and take advantage of the AI search world? Contact us, we will explain how we integrate Weglot , which languages give the most impact and how we can make your content relevant and multilingual together.

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