Here's why:
* Switzerland: While Switzerland is multilingual, its official languages are German, French, Italian, and Romansh.
* Belgium: Belgium is officially bilingual, with Dutch and French being the official languages. German is spoken in a small part of the country.
* Luxembourg: Luxembourgish, French, and German are official languages, but not Italian.
While these countries have multiple official languages, there isn't one that officially recognizes French, German, and Italian.