This is the 7356th most frequent Polish word.
kaufland
"Kaufland" is a German-owned supermarket chain, not a Polish word.
In this sentence, 'Kaufland' is used as a proper noun referring to the name of a supermarket chain.
Wczoraj odwiedziłem Kaufland, aby zrobić zakupy spożywcze.
Yesterday, I visited Kaufland to do grocery shopping.
Here, 'Kauflandzie' is the locative form of 'Kaufland' used to denote being inside the supermarket.
Czy wiesz, czy w Kauflandzie są już promocje na kawę?
Do you know if there are already promotions on coffee in Kaufland?
In this sentence, 'Kaufland' is used to refer to any outlet of the supermarket chain by its brand name.