Converts a natural number in the range 0 to 19 into a word in the English language.

{{Cardinal to word/0 to 19|natural[|zero=zero]}}

natural: Required. A natural number in the range 0 to 19.

zero: Optional. The value to use when the number is 0. Default is "zero". Can be made empty or, for example, "no", "none" or "nought", as appropriate for the context.

 {{Cardinal to word/0 to 19|0|zero=not a sausage}}
 {{Cardinal to word/0 to 19|5}}
 {{Cardinal to word/0 to 19|18}}
 {{Cardinal to word/0 to 19|20}}
 {{Cardinal to word/0 to 19|-1}}
 

produces:

not a sausage 
five
eighteen
{{Cardinal to word/0 to 19}}: value "20" is not a natural number in the range 0 to 19)
{{Cardinal to word/0 to 19}}: value "-1" is not a natural number in the range 0 to 19)