Learn Croatian: Tražim račun. - I am looking for the bill.

It is in the accusative case! Račun (bill) is a masculine noun. In Croatian, masculine nouns are split into two groups: animate (living beings) and inanimate (objects). Because a bill is an inanimate object, its accusative singular form is exactly the same as its dictionary form.

Where is the word for 'I' in this sentence?

The word for 'I' (ja) is hidden inside the verb tražim. The -im ending tells us that it is the first person singular. In Croatian, subject pronouns are usually dropped unless you want to emphasize who is doing the action.

There are no words for 'the' or 'for' in the Croatian sentence. Why is that?

Croatian doesn't use articles like 'a' or 'the', so račun can mean 'a bill' or 'the bill' depending on context. Also, the verb tražiti means 'to look for' all by itself. You don't need an extra word for 'for'; the action is directed straight at the object.

Can račun mean anything else besides a restaurant bill?

Yes, račun is a very versatile word. It is used for a restaurant bill, a store receipt, an invoice, and even a bank account.