The Swiss style is based on grids, with design elements being strong geometric shapes. Some will say that it is been used too much, but I still find its simplicity striking.
One of the Swiss styles most used font is Helvetica.
“I don’t think that type should be expressive at all. I can write the word ‘dog’ with any typeface and it doesn’t have to look like a dog. But there are people that [think that] when they write ‘dog’ it should bark.”
Massimo Vignelli in the documentary Helvetica.
By designing in a Swiss style way, you will have rules and guidelines to follow. They are there for a reason. I am not against breaking the rules, but knowing witch rules you break and which effect you want is crucial.