What are the effects of accented characters and interface languages on search results?

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When you search for keywords with accented characters, our algorithm language also considers keywords that contain and do not contain this accent mark. For example, the user enters the word "México," and the search results we return will include pages that contain "México" and "Mexico".

Conversely, if a user enters a keyword without accented characters, and the spelling of the word may be accented, our algorithm language also considers keywords with or without accent marks. So, if the user enters the word "Mexico", we will return the Web page results associated with "Mexico" and "México".


What are the effects of searching the user's interface language?

In this process, the search user's interface language is also included in our consideration. For example, because the rules used by different languages for accented characters vary, the equivalence between accented characters and unstressed characters can vary depending on the language of the user interface.

Not only that, we think that documents with the same language in the interface are more relevant. If the search user's interface language is English, our algorithm language assumes that the query is mainly in English, and the user wants us to be able to return the English material.

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This means that even for the same search keyword, the search results returned under different interface languages are not the same. If the user chooses only a specific language, the search results may vary depending on the location of the user (based on their IP address). If users have customized their own personalized search, this will also affect the search results.  The following example shows the results returned when a user using the Spanish interface searches for "Mexico".

Note that when the interface language is Spanish, even if the input keyword itself does not have accented characters, more results are accented.

How do I limit search results?

To get search results that contain only specific language versions, including or without accented characters, you can add a "+" before the search word. For example, when you search for "+mexico", the returned page will contain only "Mexico" (instead of "México"). Instead, the page returned when you search for "+méxico" will contain only
México and no Mexico. You may notice that some search results do not seem to use the language version you specify, but the language version of the keyword appears in the content of the page or in the Dibon text of the page, not in the title or description of the result. (You can select Statistics > Web Analytics in Webmaster tools to view the top-level Dibon text that is connected to your site.) The following example shows the results returned when using "+mexico" as a keyword search.