a language they speak in Switzerland
In Romansch, "the end" is translated as "l'ends." Romansch is a Romance language spoken in Switzerland, and it has several dialects, so the exact phrase might vary slightly depending on the specific dialect.
Switzerland
Romansch
Switzerland has four national languages including Romansch. The other three official languages are German, French, and Italian.
German, French, Italian and Romansch
I believe the word you might want is romance.
Romansch, which is a latin based language.
French, Italian, Spanish and Romansch
There is no such language as "Swiss". Switzerland uses German, French, Italian and Romansch.
Four main languages: French, German, Italian and Rhaeto-Romansch.
Both Romansch and French are rooted in Latin.
Romansch is spoken in the far south-east of Switzerland, in parts (but not all) of the canton of Graubünden.