This is the 1742nd most frequent Polish word.
tacy
The Polish word "tacy" means "such" or "like that" (plural form).
Here, 'tacy' is used as a demonstrative adjective to characterize a certain group of people.
Tacy ludzie są zawsze mile widziani.
Such people are always welcome.
In this sentence, 'tacy' refers to the nominative plural form of the noun 'taca' (tray).
Czy widziałeś tacy jakie kupili do restauracji?
Have you seen the trays they bought for the restaurant?
Here, 'tacy' is used in a colloquial way to refer to people of similar characteristics.