[DOC] Tokenizer - Letter

_analyzers/tokenizers/letter-tokenizers.md

@@ -0,0 +1,36 @@
+---
+layout: default
+title: Letter Tokenizer
+parent: Tokenizers
+nav_order: 60
+---
+
+# Letter tokenizer
+
+The `letter` tokenizer splits text into words when it finds any character that isn't a letter. It works well for many European languages but struggles with some Asian languages where words aren’t separated by spaces.
+
+
+## Example 
+
+Let's use the `letter` tokenizer to process text by breaking it into individual terms whenever it encounters non-letter characters.
+
+
+```json
+POST _analyze
+{
+  "tokenizer": "letter",
+  "text": "Cats 4EVER love chasing butterflies and rainbows!"
+}
+
+```
+{% include copy-curl.html %}
+
+Analyzing the text "Cats 4EVER love chasing butterflies and rainbows!" with the `letter` tokenizer produces the output: 
+
+```
+"Cats", "EVER", "love", "chasing", "butterflies", "and", "rainbows"
+```
+
+## Configuration
+
+The letter tokenizer does not have any customizable settings.