If you don't plan to come to Switzerland, and especially to Bern, or if you simply don't look forward to court Ursula Andress's little sister (or daughter), then, this node is not for you.
As a pre-requisite, you should know that though most Berner speak either German (Hochdeutsch) or French (and also English or even Italian), the best way to communicate with them is by using their own language : Bärndütsch.
Here are some useful words or sentences to help you establish a dialog with a genuine Berner :

• Gruessech [G(HR)wesse(HR)] : Hello
• Hoï [Oy] : Hi
• Gruezi [G(HR)wetzi] : Hello (beware of this one which sounds like you're a Züricher ;-)
• Any of the above + Mitenand [Mitenand (no fancy pronounciation)] : Hello, Hi, etc. to more than one person.
• Merçi[Mercy ] : Thanks
• Merci Viel Mal [Merci fill mal] : Thanks a lot
• geht's ? [gate's] : How are you ?
• chguet [shgoowet] : I am all right
• Adé [Adé] : Bye
• Adiö [Adiö] : Bye
• Excusez [Ekskoozé] : Sorry
• Pardon [Pardon] : Sorry
• Schissdreck [shissdreck] : Sh*t!

"(HR)" is a guttural "R"
Adiö Mitenand !