Hi and welcome to the forum.

One major question is where are you coming from? And what is the background of your parents?

When I moved to France, there were people who asked me if I was going to bring my father over to live there. But there are some serious considerations that may make it undesireable to move them into a care home in a foreign country.

Do they speak any Portuguese? It's unlikely the care home staff will speak any English, nor will any of the other residents. Also, what will you do for them when it comes to health care insurance or other entitlements they may be receiving where they are now? If you're coming from within the EU, it might work out - but do take the language issue into careful consideration. It could be very isolating for older people to be in a care home where nobody speaks their language.
Cheers,
Bev