"Bon voyage" is... French, to "good voyage" or "good travel". In Portuguese: "Boa Viagem".
Bon voyage would be close enough.
"bon voyage !" or "faites bon voyage !"
bon voyage in latin
Bon voyage would be "kαλό ταξίδι."
In Flemish, you can say "goede reis" to wish someone a good journey or bon voyage.
Bon Voyage is french. Say "Bon Voyage". The current phrasing does not make sense in English or in French. One would not say "Safe Travels, our friends" in English. One might say "May you have safe travels, dear friends" which would be translated as "Bon Voyage, chers amis". Bon voyage a nos ami - in french safe journeys our friends- in English
Prettige Reis would be the equivalent of Bon Voyage in the Dutch Language.
Bon voyage = Buen viaje
Boa viagem = bon voyage (or have a good trip)
Bon voyage!
Bon voyage