Thank you, Wendy and Mark.

You're right, Mark, I forgot that. France, I also made a mistake at the beginning and in the middle (confusing!)
Well then . . . Thank you for letting me know, anyway . . . Right then, hasta luego . . . Arriverderci.

Perhaps, use italics for the Spanish an Italian as well.

Thanks for your help, Wendy!

Now the writing here is normal again!

Hello France - with italics you would type it like this:
Bon ben . . . Thank you de m'avoir prévenu, en tout cas . . . C’est ça, hasta luego . . . Arrivederci.

Suggest, translate it exactly as written above.
In English books, expressions in other languages are often left untranslated.