IPA: /'pa.ʧe/

should have what the english would call a ch sound n'est ce pas?

It would be "peace accord". I think that both the constructions are valid. Here you can read the beginning of the Lomé Peace Accord article in the English Wikipedia: "The Lomé Peace Accord was a peace agreement signed on 7 July 1999 between the warring parties in the civil war that gripped Sierra Leone for almost a decade."