我创建了一个集合链接。每个文档都有一种现场语言。当我尝试搜索时，全文搜索无法根据语言进行。
我尝试使用“it”/“en”和“italian/english”（https://docs.mongodb.com/manual/reference/text-search-languages/#text-search-languages）我尝试使用language_override（https ://docs.mongodb.com/manual/tutorial/specify-language-for-text-index/#create-a-text-index-for-a-collection-in-multiple-languages）
use search
//Insert some data
db.links.insert({"language": "it", "content": "quando cammino ho male al ginocchio"})
db.links.insert({"language": "it", "content": "ho male alle ginocchia"})
db.links.insert({"language": "en", "content": "A lot of pain knee"})
//Create index
db.links.createIndex({content: "text"})
//Test search but with empty result
db.search.find({$text: {$search: "ginocchia"}})
//I try default english works
db.links.find({$text: {$search: "knee"}})
//So I drop indexes and try language_override
db.links.dropIndexes()
db.search.createIndex({content: "text"}, {language_override: "language"})
//Test search but with empty result
db.search.find({$text: {$search: "ginocchia"}})
//I try default english works
db.links.find({$text: {$search: "knee"}})
//If I set default_language in "it" working in italian and not in english.
我预计如果我插入“ginocchia”，则获得第一个两个文档，如果我插入“knee”，则获得最后一个。