Apr 3, 2023
(2 votes)

Improve performance by enabling language routing on search requests

In Find 13, we introduced language routing on indexing to improve indexing performance for indexes setup with multiple languages.

With the release of Find 13.4.9, we further introduced language routing on query time. We recommend moving up to 13.5.7 due to other bug fixes. This feature is also available in .NET flavours: 14.2.4 and 15.0.3

This feature enables passing the query only to the specific language index, rather than having all language indexes process the query even though most of them would only respond with 0 hits as we're usually filtering on language properties in the index.

Since 13.5.1 this feature is disabled by default.

To enable this feature, there are a few steps to follow:

  1. Ensure that you explicitly or implicitly set the language for your query.
    You typically achieve this by using one of the following approaches:
    .Search<type>(language) or .UnifiedSearch(language)
    Alternatively, you can rely on the extensions provided by Episerver.Find.CMS and use
    .UnifiedSearch() or .UnifiedSearchFor()
    which will automatically set the preferred culture if you don't specify one. Be careful not to use the Episerver.Find extensions, as they do not resolve language.

  2. You can verify that everything is working correctly by checking the analyzer set in the JSON for the request against the _search. 
    It should say analyzer:[language]. If you are using .UsingSynonyms() it should say analyzer: synonym_[language_code].

  3. If you are using CMS 11, you can do this in the web.config file by adding the following:
        <add key="episerver:EnableLanguageRoutingInSearchRequest" value="true"/>
    If you are using CMS 12, you can do this in the appsettings.json file by adding the following:
    "EPiServer": {
        "Find": {

Note that if you have custom InField extension that makes it possible to query fields for multiple language fields, language routing query time cannot be used.

Our tests have shown a decrease in response times of around 25% for queries with language routing enabled. 
However, this improvement may vary depending on your implementation, the number of languages enabled on the index, and the data indexed.

Find versions that support language routing on search requests

Apr 03, 2023


Eric Petersson
Eric Petersson Apr 4, 2023 06:16 AM

Cool! When updating to Find in .NET Framework I get that the packages are based on EPiServer.Cms 11.20.17, which is not availble from the nuget feed. 

Is there a planned release date when it will be available?

dada Apr 4, 2023 07:25 AM

Hi Eric,

Thanks for the feedback. I assume you mean 13.5.7. I will check with the dev team and get back to you.

Eric Petersson
Eric Petersson Apr 4, 2023 07:32 AM

Hi again, the EPiServer.Cms 11.20.17 version

Please login to comment.
Latest blogs
Extended SelectionFactory

In one of my previous articles I described new Color Picker widget. Today I’d like to show another simple property. I prepared extended version of...

Grzegorz Wiecheć | Jun 7, 2023 | Syndicated blog

Unlock Creativity with Text Generation

Need fresh and innovative content ideas? The Epicweb.Optimizely.AIAssistant Addon has got you covered with its text generation feature. In this blo...

Luc Gosso (MVP) | Jun 6, 2023 | Syndicated blog

Breaking Language Barriers with Multilingual Text Translation

In today's globalized world, effective communication across languages is essential. The Epicweb.Optimizely.AIAssistant Addon makes language...

Luc Gosso (MVP) | Jun 6, 2023 | Syndicated blog

Optimizely Search & Navigation - Get autocomplete suggestions in right language

When you are using Optimizely Search & Navigation (Find) to help you generate autocomplete suggestions server side in a multi-language scenario it...

Allan Thraen | Jun 5, 2023 | Syndicated blog

Easy property inheritance in Optimizely CMS

Ever needed a way to inherit property values down through the page hierarchy in Optimizely CMS 12? Now there is an easy way to enable that.

Allan Thraen | Jun 5, 2023 | Syndicated blog

Content Bulk Edit

Bulk Edit is a plugin that allows to make changes to more than one Content at the same time. This can save time by simultaneously updating multiple...

Grzegorz Wiecheć | Jun 5, 2023 | Syndicated blog