The results of searching for "Montessori kindergarten": 4 English-speaking places
There are also organizations that speak other languages: Russian, Ukrainian, and German.
Przyczółkowa 140 01-001 Warszawa Poland
Piechoty Łanowej 46A 01-001 Warszawa Poland
Tatrzańska 5A 00-401 Warszawa Poland
Lipowa 22A 05-520 piaseczyński Poland