How many open access journals with no APC from Presses universitaires de Rennes are there?

This directory lists 2 open access journals with no APC from Presses universitaires de Rennes. Every listing has been filtered to journals that charge no article processing charge.

Do these journals really charge nothing to publish?

Yes. Every journal listed charges no article processing charge. Some journals may still levy other fees such as submission or page charges — those are shown separately on each journal page, and you can filter to journals with no other fees at all.