Entre - American main Course, or French - starter
Brevet British vernacular for a flying badge, or French - paper certificate.
Gay 1914 happy and Jolly - 2014 'Good As You'
Kite, childs flying toy or Big Boys flying toy,
Plane -carpenter's tool or Big boys flying toy
Same words, different times and languages meaning different things to different people.
Language evolves, semantics may say brevet is a certificate, but most will still understand the the use of brevet refers to a flying badge which in turn is a representative of the certificate awarded to permit the wearing of the flying badge. One can't have the badge without the certificate, so brevet has become synonymous with the badge.