Coding exceptions with patter-matching

[Sean 'Shaleh' Perry]

> 
> Now I've found a problem dealing with exceptions in human languages.
> For example, how to code
> that you have feet instead of foots?

It gets worse (=:

There is no plural form of some nouns in English.  Take fish and fruit for
instance.  I am sure other languages have similar oddities.  I suspect you will
need to have both case by case items and pattern items.

Would it simplify things if you some how split the exception list?