Dingle is in the Gaeltacht area of Ireland, which means it is an Irish speaking area (Don't worry, they speak English aswell). Simple words like Conás ata Tú (Pronnounced con-as-a-ta-tu) which means How are you or Tá mé go maith (ta-may-gu-mo) which means im fine or im good. if you want to say Dingle don't call it An Danigean because the locals don't like that name call it Daingean-ú-Chuais.
I heard fellow Germans in the B&B who were surprised when they heard that there was a language called Irish. I was shocked....
So here are a few facts that might be helpful:
Yes there is a language called Irish.
Yes everyone has to learn it in school.
No, it's no dialect of English.
Yes, in some areas (Gaeltachts) people still speak it in everyday life. Not only the old people! In Dingle, too!
Yes, on some signs in these areas signposts are only in Irish - so you better check the Irish name of the place you are going to before hitting the road!!
Enzo has a few great pages about the language on his Ireland page...
English is, of course, understood in Dingle but if you want to use some Irish, then they'll love you for life down there :)
This link is a beginners guide to Irish if you want to order a pint of Guiness in Dingle! :)