Language-specific queries
When you set up an index, you define the languages it supports. When searching a defined language, you use the Client class and the Search extension method, and pass to the Search extension method an instance of the Language class.
Optimizely Search & Navigation also has a Language routing feature that lets you limit search queries to documents in a specified language.
This feature is not enabled by default. You enable it by setting EnableLanguageRoutingInSearchRequest to true in the Find configuration section. This setting will enable language-routing for both search and msearch queries. See Improve performance by enabling language routing on search requests (blog post by Daniel Dahlin) for more details.
"Find": {
"DefaultIndex": "your_index",
"ServiceUrl": "find_service_url",
"EnableLanguageRoutingInSearchRequest": true
}Optimizely Search & Navigation exposes an instance for each supported language as a static property on the Language class.
client.Search<BlogPost>(Language.Swedish)
.For("turtles")
.InField(x => x.Title);For msearch queries (available from version 16.6.0):
client.MultiSearch<BlogPost>(Language.English)
.Search(s => s.For("tiger").InField(x => x.Title))
.Search(s => s.For("bear").InField(x => x.Title));
//or
client.MultiSearch<BlogPost>()
.Search(s => s.For("tiger").InField(x => x.Title))
.Search(s => s.For("bear").InField(x => x.Title))
.LanguageRouting(Language.English);
//or
client.MultiUnifiedSearch()
.UnifiedSearch(s => s.For("tiger"))
.UnifiedSearch(s => s.For("bear"))- Note If you using MultiUnifiedSearch the search request uses LanguageCulture in a msearch context for language routing, if LanguageCulture is not specified, PreferredCulture becomes the default language routing. You can override this by chainingLanguageRouting(Language.English)method to the query builder.
- You can search all languages by using LanguageRouting(Language.All) or LanguageRouting(Language.None).
The language parameter only applies when specifying one or more fields to search. If you do not select fields, Optimizely Search & Navigation searches over the special _all field, which supports only a single analyzer. Likewise, it uses the standard analyzer when searching attachments (Word documents, PDFs, and so on).
When a language is specified, the search applies stemming tailored to that language. Consequently, when you include a language parameter, Optimizely Search & Navigation provides results across all languages and for stemmed words in the specified language. To restrict results to a particular language, use a filter (such as, FilterForVisitor).