I'm sure there is, somewhere in the deep recesses of the Internet, a camlp4 or camlp5 syntax extension to replace `let`, `rec`, `if`, `then`, `else` with `soit`

I'm sure there is, somewhere in the deep recesses of the Internet, a camlp4 or camlp5 syntax extension to replace `let`, `rec`, `if`, `then`, `else` with `soit`, `réc`, `si`, `alors`, `sinon` :)