One of the choirs I sing in has just started rehearsing for a concert performance of Bizet’s Carmen later this year. As part of my diligent preparation, I’m watching a full performance on Youtube, sung in French but subtitled in Spanish.
The first words in French are Sur la place (usually /plas/ but in the opera /pla·sə/) and in Spanish Por la plaza. The English translation provided by our conductor gives On the square, which a) is rather prosaic, and b) doesn’t fit the melody. If the opera was sung in English, this would have to be On the plaza (or possibly (not) In the main street).
English place, French place, Spanish plaza and Italian piazza are all derived from Latin platēa, street, courtyard, area and Greek plateîa broad street and platýs broad, flat, as in platypus (broad foot). Plaza is now a full English word, and piazza would be understood by many English speakers but is probably not a full English word, while French place is not an English word and by itself would probably not be understood by many English speakers.
I might call the main square of Brussels /ɡʁɑ̃ plas/ or “the main square”, but not “the /plas/” and certainly not “the place” (“I’ll meet you at the place”).
Compare sur la plage (on the beach) which is certainly not English.