Zrobić przerwę na lunch.

Yes, it is a borrowed word that is now fully integrated into the Polish language, especially in urban and professional contexts.

You will be understood, but 'zrobić przerwę' is much more natural for a native speaker.

Lunch is a quick midday meal during work. Obiad is a traditional, often larger meal eaten in the afternoon or evening.

In 'przerwa na lunch', it stays as 'lunch'. In other cases like 'po lunchu' (after lunch), it changes.

It's common, but 'zrobić przerwę' usually implies stepping away from the desk for better health and social contact.

Usually 30 to 60 minutes, depending on the company policy.

In many Polish contracts (Umowa o pracę), there is a mandatory 15-minute paid break, but longer lunch breaks are often unpaid and added to the workday.

Not really. On weekends, people usually just say 'obiad'. 'Lunch' is heavily associated with the workday.

Then say 'robię przerwę na przekąskę' or 'jem drugie śniadanie'.

It's neutral. You can use it with your boss or your colleagues.

In Polish, 'na' + Accusative is the standard way to express the purpose of a break (e.g., przerwa na kawę, przerwa na papierosa).

Yes, 'idę na lunch' is very common and implies you are physically leaving your current location to eat.