What language do they speak in Vienna?

Vienna is the capital of Austria. Austria is a langlocked country between Italy and Germany.

Most locals in Austria speak Austrian-German, a variation of German. It's a dialect.

Austrian German isn't all the same all over the country, many variations exist from West to east. Vienna locals speak a Vienna Austrian German.

But most people understand regular German and many know English too.

Many sites show English descriptions and getting an english guide is super easy in Vienna.