[[configuring-language-analyzers]] === Configuring Language Analyzers While the language analyzers can be used out of the box without any configuration, most of them ((("english analyzer", "configuring")))((("language analyzers", "configuring")))do allow you to control aspects of their behavior, specifically: [[stem-exclusion]] Stem-word exclusion:: + Imagine, for instance, that users searching for((("language analyzers", "configuring", "stem word exclusion")))((("stemming words", "stem word exclusion, configuring"))) the ``World Health Organization'' are instead getting results for ``organ health.'' The reason for this confusion is that both ``organ'' and ``organization'' are stemmed to the same root word: `organ`. Often this isn't a problem, but in this particular collection of documents, this leads to confusing results. We would like to prevent the words `organization` and `organizations` from being stemmed. Custom stopwords:: The default list of stopwords((("stopwords", "configuring for language analyzers"))) used in English are as follows: + a, an, and, are, as, at, be, but, by, for, if, in, into, is, it, no, not, of, on, or, such, that, the, their, then, there, these, they, this, to, was, will, with + The unusual thing about `no` and `not` is that they invert the meaning of the words that follow them. Perhaps we decide that these two words are important and that we shouldn't treat them as stopwords. To customize the behavior of the `english` analyzer, we need to create a custom analyzer that uses the `english` analyzer as its base but adds some configuration: [source,js] -------------------------------------------------- PUT /my_index { "settings": { "analysis": { "analyzer": { "my_english": { "type": "english", "stem_exclusion": [ "organization", "organizations" ], <1> "stopwords": [ <2> "a", "an", "and", "are", "as", "at", "be", "but", "by", "for", "if", "in", "into", "is", "it", "of", "on", "or", "such", "that", "the", "their", "then", "there", "these", "they", "this", "to", "was", "will", "with" ] } } } } } GET /my_index/_analyze?analyzer=my_english <3> The World Health Organization does not sell organs. -------------------------------------------------- <1> Prevents `organization` and `organizations` from being stemmed <2> Specifies a custom list of stopwords <3> Emits tokens `world`, `health`, `organization`, `does`, `not`, `sell`, `organ` We discuss stemming and stopwords in much more detail in <<stemming>> and <<stopwords>>, respectively.