Learn Polish: Czy wolno nam wprowadzać psa do restauracji na smyczy? - Are we allowed to bring a dog into the restaurant on a leash?

Wolno is an impersonal word meaning it is allowed. In Polish, to express who is allowed to do something, we use the Dative case (the to/for case). So wolno nam literally means it is allowed to us.

Why is the verb wprowadzać (imperfective) used here instead of the perfective wprowadzić?

When asking about general rules or policies (like whether dogs are generally allowed in a restaurant), Polish uses the imperfective aspect. If you were asking for permission to bring the dog in just this one specific time, you would use the perfective wprowadzić.

We are bringing the dog into the restaurant, so why don't we use the Accusative case for restauracji?

The preposition do (into/to) always requires the Genitive case in Polish, even when there is motion involved. The Accusative case for motion is used with prepositions like w or na, but never with do.

What case is smyczy in the phrase na smyczy, and what is its base form?

The base form is smycz (leash), which is a feminine noun that ends in a consonant. The preposition na describing a physical state or position takes the Locative case. For feminine nouns ending in a consonant, the Locative ending is often -y or -i, making it na smyczy.