Is there a Polish version of the French song, 'J'attendrai' and which singer would you recommend?
I'm not aware of Polish version of "J'attendrai" but there is Polish version of "La vie en rose" by Wiera Gran.
You might want to look up the fallowing artists on youtube before you spend your money on CD's. I'm sure you will find what you're looking for.
These are but a few of the artists of that era; Tadeusz Faliszewski, Mieczysław Fogg, Marian Demar, Wera Bobrowska, Wiera Gran, Marta Mirska, Janusz Popławski, Natasza Zylska, Barbara Muszyńska, Katarzyna Bovery.
Wiera Gran - "La vie en rose"
Marta Mirska - Bésame mucho