The single factor that most accelerates your integration and career — and the most underestimated before arrival.
In German-speaking Switzerland, daily life is mostly conducted in Swiss German (Schwiizerdütsch), a set of dialects quite different from standard German with no fixed written form. The good news: everything written, education, and almost the entire formal work environment use Standard German (Hochdeutsch) — that's what you should study first. Dialect comprehension comes naturally over time, just by listening.
Many large companies in Zurich, Basel or Zug operate internally in English, especially in tech, pharma and finance — but outside the office, the local language still makes a real difference to your day-to-day life and social integration.