Ruby on Rails

Latin students memorize dominus as: 'dominus, domini (singular genitive), masculine' and currus as 'currus, currūs, masculine'. This is how students disambiguate the two.

So, now, how to handle that in ActiveSupport?

Well, hmph.

It seems like we should be able to say:

'currus'.pluralize(:la) #=> 'currūs' 
dominus'.pluralize(:la) #=> 'domini'

But this produces the wrong results, as mentioned above.  If pluralize took a second argument of an array we might be able to do something
like:

'currus'.pluralize(:la, <optional genitive>currūs) #=> 'currūs'

then:

dominus'.pluralize(:la) #=> 'domini' - WORKS
'currus'.pluralize(:la, 'currūs') #=> 'currūs' - WORKS

This design would also allow me to support the 3rd declension of Latin verbs which are identified by the genitive not by the nominative.

A list of rules based on the nominative ending will fail to catch this one

arx'.pluralize(:la) #=> wtf?

whereas

'arx'.pluralize(:la, 'arcis') #=> 'arces' - WORKS