toString ( dw::util::Coercions ) - locale parameter

[andersoal]

The doc:

• toString | MuleSoft Documentation
• docs-dataweave/modules/ROOT/pages/dw-coercions-functions-tostring.adoc at v2.4 · mulesoft/docs-dataweave

Doesn't explain the possible parameter locale in the table and how to use for the function toString

toString(number: Number, format: String | Null = null, locale: String | Null = null, roundMode: RoundingMode | Null = null): String

For example, can I use en-US, just US or es-ES and ES?
Maybe mention some external documentation from Java.