I come from the southern side of Switzerland and here we speak italian.
There's a lot of swiss people that play in italian bands, Stop Talking for example.
From the south:
The Coming Fall RIP (Ticino)
(Great band with great lyrics)
Open Close my Eyes (Ticino)
(Old band Better Than a Thousand oriented)
(Old Band similar to Warzone)
Face the Game (Ticino)
From the german side:
Fall Apart RIP (Schaffhausen)
(Nice Band with the same style as Empty Vision and Ritual)
From the French side (There are only bands with Gangstah attitude) :)
The Stand (Lausanne)
One Last Chance (Geneva)