elasticsearch/docs/reference/text-analysis/analysis-letter-tokenizer.md

---

navigation_title: "Letter" mapped_pages:

• https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-letter-tokenizer.html ---

Letter tokenizer [analysis-letter-tokenizer]

The letter tokenizer breaks text into terms whenever it encounters a character which is not a letter. It does a reasonable job for most European languages, but does a terrible job for some Asian languages, where words are not separated by spaces.

Example output [_example_output_11]

POST _analyze
{
  "tokenizer": "letter",
  "text": "The 2 QUICK Brown-Foxes jumped over the lazy dog's bone."
}

The above sentence would produce the following terms:

[ The, QUICK, Brown, Foxes, jumped, over, the, lazy, dog, s, bone ]

Configuration [_configuration_12]

The letter tokenizer is not configurable.