Dear Damaris,
I was able to find a page online that will help answer your question. Apparently, for parents that live abroad, there is a form they need to fill out called an FSA ID, and they will need to convert assets and income into dollars in the FAFSA form. I have copied and pasted the link that should provide you some of this pertinent information. If you require any further assistance, feel free to email me back and let me know.
Best,