It's not possible to do this from the PIM interface, but you can use the APIs:
First, retrieve all your attributes :
GET /api/attributes
Then loop on the results to update each attribute :
PUT /api/attributes/{id}
With a body similar to :
{
"name": {
"fr-FR": "test_fr",
"en-US": "test_en"
}
}
More on the attributes API here : https://docs.quable.com/reference/putattributesitem