Unfortunately quite a few sentences, but it is what it is. I’ve taken care of those.
“In total, the material consists of approximately 700,000 translation pairs/sentence pairs.” sounds very promising indeed. License seems fine as well. I think importing those would be great. You might want to have a look at the bulk import process though, as going through Sentence Collector with that many sentences is not really efficient. See “Bulk submission” at 📝 Text Corpus | Community Playbook.