Wrong Plural for Category

Just curious but isn't the Plural of Category Categories?

Roo generates the plural as Categorys.

Code:

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project --topLevelPackage com.springsource.issue

persistence setup --provider HIBERNATE --database HYPERSONIC_IN_MEMORY

entity --class ~.domain.Category --testAutomatically
field string --fieldName name --sizeMin 2 --sizeMax 255  --notNull

entity --class ~.domain.PetCategory --testAutomatically
field string --fieldName name --sizeMin 2 --sizeMax 255  --notNull

controller all --package ~.web

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I understand you can override the Plural using @RooPlural I just thought the correct rule for Plural is if there is a constant before the 'y' then it should replaces the y with 'ies' and if it is a vowel then it just add an 's'.

So Category should be Categories, Story -> Stories
And Stay should be Stays