Learn Turkish: Fiyata her şey dahil, kahve hariç. - Everything is included in the price, except coffee.

The word dahil (included) requires the word it applies to to take the dative case (-a or -e). While in English we say 'included in the price', Turkish literally says 'included to the price' (fiyata dahil).

Is her şey always written as two separate words?

Yes! Unlike English where 'everything' is one word, Turkish always separates şey (thing) from the word before it. So you will always write her şey (everything), bir şey (something), and hiçbir şey (nothing) with a space.

Where is the verb 'is' in this sentence?

There is no explicit verb here. This is a typical 'nominal sentence' where the 'is' is simply implied. In more formal contexts, you might see dahildir (using the 'to be' suffix -dir), but in everyday speech and on signs, it is usually dropped.

How are dahil and hariç used together here?

They are a very common pair of opposites used to clarify conditions. Dahil means 'included' and hariç means 'excluded' or 'except'. You will frequently see them used exactly like this on Turkish menus, tours, or hotel listings to explain what a price covers.