En réponse à Ray Brown :

>Of course, as Shreyas rightly observes, spoken French does just this, with
>the additional funnction
>of definiteness ~ indefiniteness, cf. the word for "school":
>                         SING.      PLURAL
>   DEFINITE: /lekOl/   /lezekOl/
>INDEFINITE: /ynekOl/  /dezekOl/

Actually, to be more correct, and closer to actual pronunciations, you 
should write:
                 SING.           PLURAL
DEFINITE        /le'kOl/        /lEze'kOl/
INDEFINITE      /yne'kOl/       /dEze'kOl/

The E~e distinction is phonemic.

Christophe Grandsire.

You need a straight mind to invent a twisted conlang.