I can guarantee that you won't need to speak Swiss in Geneva - there's no such language!
The official languages of Switzerland (in descending order of use) are German, French, Italian and Romansch. Geneva is French-speaking. You can learn more about Geneva from the official tourism website:
http://www.geneve-tourisme.ch/index.php?rubriq ue=0000000000&lang=_eng
Looking at a map, I can't work out how you could live somewhere around Nottingham/Manchester without being able to get to Robin Hood Airport. Perhaps you should consider flights from there, as well as from the airports you've mentioned? (Robin Hood airport is served by a fast, frequent bus service from Doncaster. Doncaster, in turn, has good rail links to most places in your area). There's a list of destinations served from Robin Hood Airport here:
http://www.robinhoodairport.com/page_destinati ons_29.html
My own recommendation would be Barcelona. As Mushroom25 states, Ryanair fly to Girona (from both East Midlands & Robin Hood) and there's a connecting bus into Barcelona. (Jet2 fly direct to Barcelona from Manchester and, if it's not too far away from you, Leeds/Bradford). It's a wonderful city, with great beaches, marvellous heritage, funky bars, great restaurants, etc. It's great for people of all ages at any time of the year. You won't have any language problems: Although the local language is Catalan, everyone speaks Spanish and many people speak English:
http://www.barcelonaturisme.com/?go=jN7uAYLx/o IJaWVQCb4ZU93ygJVYLOpRQdvyIue/wAW6Ddhyhal0Y8Jy bdczumN4RSbo3CRL94sJBt7u1Kc=
Chris