Hi Ibrahim ,
Thanks for your question.
Unfortunately, at this moment ATUM Export doesn't support WPML data. We have it on our roadmap but I can't give you an ETA.
Anyway, if what you want is to update some products and translations data, depending on your WPML settings, you can update each translation per separate or update the original product's data with ATUM Export. On the other hand, if what you want is to import new products with their translations, you'd need to import each translation separately and after that relate the translations by yourself.
Best Regards,
José Andrés