You can test how language affects search queries and results if your site is configured to support searches in multiple languages. You can test:
What results a site user sees when the user enters search text in a particular language
Which search configuration is applied based on a site user’s language dimension value
How rules in a search configuration affect results when search text is entered in one language and the search engine returns results in multiple languages, for example, whether a rule is triggered, whether the search configuration tree is navigated as expected, etc.
The search text language is not the same as the language dimension value used to select search configurations. The search text language tells the search engine which language the search text is written in, while the language dimension value represents a site visitor’s language. Usually, your commerce site is configured so that the search text language matches the site visitor’s language, but that might not always be the case.
Here are some examples of situations where the language dimension might be different from the search text language:
A commerce site has search configurations for both French and English language customers, but the site contains only English text and supports only English language searches. In this case, the search configurations in both the French and English language dimensions are associated with the English search index, and, since the site is written only in English, it is assumed that all site visitors search using English language terms.
There are two versions of a North American commerce site, one in English and one in Spanish. There are three language dimension values for selecting search configurations: English, Spanish, and All Others. The All Others dimension value is associated with the default language, which in this case is English.
When you test search terms in a search configuration and your site supports multiple languages, you choose which search configuration and which search text language to use in the test. As a general rule, the languages of the two should match. Remember, rules in the search configuration that are triggered by a search term cannot be applied if the search text is in a different language Sites in a Search Test