--- title: Optimize search results for multiple sites and languages slug: cms-12/docs/optimize-multiple-sites-and-languages createdAt: 2026-08-10T15:56:00.000Z --- Because search optimization is often language-specific, Optimizely Search & Navigation supports multiple languages and websites. ## Filter by websites and languages At the top of the most Optimizely Search & Navigation screens, drop-down lists choose a website and a language analyzer to filter the screen information before performing actions, such as viewing statistics and fine-tuning search optimization. ![](https://api.archbee.com/api/optimize/BrbvVORKJ5iIeSMZye5kI/Ua844VEF0mrXQ7-POXyyx_5407ac2a719d028c67840e234f50c89512b8afb79fb9586b1d26a31c713205f0-image.png) ## Set up one or more search indexes Optimizely Search & Navigation needs only one main index. Multiple websites often share a single index. Optimizely Search & Navigation adds content to the existing index if you add a website. Besides the main index, your Optimizely Search & Navigation administrator can set up additional *language-specific* indexes to increase search precision by employing strategies like word stemming. When content in a language with its index is saved, Optimizely Search & Navigation uses an *analyzer* to interpret and index the content. For example, the English analyzer uses word stemming to identify *fish* as the root word for *fishing* and *fisher*. So, if a user submits a search query that includes *fish*, *fishing*, or *fisher*, the search returns content with any word variation. In contrast, if a search term matches the content in the main index only, it must exactly match an indexed term to return search results; word variations are ignored. The number of supported language analyzers in Optimizely Search & Navigation is determined when your organization orders an index and multi-language index support from Optimizely. Your site administrator enables the analyzers during site set up. If site visitors search a multi-language website, each language version of content displays separately in search results. ## Language analyzers versus CMS content language The language analyzer is used for search optimization. Your site content can exist in several languages – they do not all need a language analyzer. A search that uses an analyzer is smarter. A developer installs Optimizely Search & Navigation language analyzers during implementation at a cost. An administrator can add content languages at any time and can enable one group of languages in Optimizely Content Management System (CMS) and a different group of language analyzers in Optimizely Search & Navigation. This may confuse users because, while the language selector on Optimizely Search & Navigation screens might look like you are choosing a content language, you are selecting an Optimizely Search & Navigation analyzer. ## Example – Enable languages and optimize search 1. Create a *Fall Fashion* page in the master language, such as English (see image). 2. Activate Danish and Swedish on the website and translate the page into those languages. 3. Apply search optimization techniques to promote the translated content. ![](https://api.archbee.com/api/optimize/BrbvVORKJ5iIeSMZye5kI/2grv48KKkqmv_rATK2I4p_c16b63a04774c5470872be52f32c8e134068d4b6a9672b435f559750ee8c29cf-image.png) 4. [Translate](docId\:lqPPNjtduC3Yycgo-k5Gp) the page into Swedish and Danish. Because you enabled Swedish and Danish in the index, the *Fall Fashion* page displays in results when searching for *tröjor* and *trøjer*, the Swedish and Danish words for *cardigans*, even though the page contains the singular form cardigan (*tröja* and *trøje*). 5. Create a [best bet](docId\:RDHBaqBLSfzgMSk2-1wXn) for the *Fall Fashion* page to promote it when someone searches for *cardigans* or *jeans*. You do not have to create best bets for the Swedish and Danish versions — Optimizely Search & Navigation automatically displays the translated versions. If a best bet's content is not translated, Optimizely Search & Navigation displays the master language version as a fallback language. 6. Add *jeans* as a one-way [synonym](docId\:q8l4QvPHrwLfBMqXib_Qj) for *trousers* in English. If a site visitor searches for *trousers*, the *Fall Fashion* page displays at the top of search results. Because it is a one-way synonym, a search for *jeans* does not return pages containing *trousers*. 7. Create the corresponding language-specific synonym pair for *jeans* in Swedish (*byxor*) and Danish (*bukser*). 8. Assume the new *style* brand replaces the old *XX* brand in the new collection. Add *style* as a synonym for *XX*, applying to *all languages*. Visitors searching for the *XX* brand also see results for the *style* brand, regardless of language. ## Example – Add websites and optimize search This example continues the previous one by [creating two campaign websites](docId\:ilWLEp79K4JuSvOR7Gckt) with targeted content: one for fashion and one for traveling, in addition to the default website. All three websites share an index and have the same languages activated. ![](https://api.archbee.com/api/optimize/BrbvVORKJ5iIeSMZye5kI/3jbAhWorDvvrngMoCdf7j_ae44cefd6873dc8630085d3fb64f05e456b275d02ff0138f2e44913a4aab1e2a-image.png) 1. Enable the desired languages in each website so editors can create and [translate](docId\:lqPPNjtduC3Yycgo-k5Gp) content. - Because the campaign websites are new and have their URL, the [statistics views](docId\:L36OxE5BDt9Di3UQErDdQ) are empty until visitors generate traffic and queries. - All websites share an index, so best bets, related queries, or autocomplete suggestions are already defined on the campaign websites. Similarly, any language-specific search optimization for all websites also applies to the campaign websites. - By definition, synonyms apply to all websites. Synonyms can be language-specific, as explained in the *style* brand example above. 2. Add website-specific related queries because the campaign websites have different content (fashion and traveling). For example, searching for *warm* (English) on a travel website might suggest tropical destinations, like Jamaica. Searching for *warm* on the fashion website might suggest *cardigans* or *sweaters*. 3. Add website-specific [autocompletion of search phrases](docId\:dzmUVJKRCRWNsGSOGXiqo). For example, if a visitor enters *car* on the fashion website, an autocomplete suggestion might be *cardigans*. On the travel website, the suggestion might be *car rental*.