Has anyone found a way to import IPTC data from a csv?

I have a lot of files with English keywords and captions in Aperture.

I need to export this metadata and get it translated into French.

I then would like to import that data back into the original files overwriting the original data.

Has anyone found a way to accomplish this?

Simply put I wish to add iptc metadata into images already in my Aperture database hopefully in an automated fashion from some kind of data file.