Map of Switzerland showing language areas.
Language assignment by postal code:
| Postal code | Area | Language |
|---|---|---|
| 1000 | Lausanne | French |
| 2000 | Neuchatel | French and German |
| 3000 | Bern | French and German |
| 4000 | Basel | German |
| 5000 | Aarau | German |
| 6000 | Luzern | German |
| 6500..6999 | Ticino | Italian |
| 7000 | Chur | German |
| 8000 | Zurich | German |
| 9000 | St. Gallen | German |