If we are talking about language courses in Switzerland that would be relatively cheap, on the one hand, and, on the other hand, of high quality and would prepare for admission to Swiss universities or for work or practice in Switzerland, then the following organizations can be distinguished here:
Education in Switzerland is expensive. Therefore, not everyone can afford to study in Switzerland. But if you are a successful student and have good academic achievements, then you have a chance to try to get a scholarship to study in Switzerland, both full-time and part-time.
If we compare the preparation systems for entering Swiss universities with the preparation systems for entering universities in Germany and Austria, then we can say that in Switzerland there is no Studienkolleg as in Germany or Vorstudienlehrgang as in Austria.
It must be said that the system of admission to universities in Switzerland is very different from the system of admission to universities in Germany and Austria. And first of all, the difference is that in Switzerland, admission to universities and other educational institutions is decentralized. This means that each individual university and higher education institution in Switzerland has its own admission rules and a list of documents that it requires upon admission. Therefore, the list of documents below is approximate and requires clarification at each individual Swiss university or university.