Here's a short history on Polish scrabble I found on http://www.geocities.com/TimesSquare/Arcade/7724/english.htm

Some people in Poland had already started playing a polish version of SCRABBLE in the 1970's using boards and letters they made themselves.
The first tournament was organized in 1987 by Jacek Ciesielski who popularized the game in a weekly publication called "Razem". He had also Polonized the rules of the game and determined the distribution of the letters.
Finally, in 1993, Polish SCRABBLE had officially started. The first polish championship took place that year with the winner being a businessman from Warsaw named Tomasz Zwolinski. Zwolinski repeated his success the following year and again in 1996 and in 1997.
In 1995 Pawel Stefaniak, a student from Biala Podlaska, became the national champion.
Zwolinski also won the second Cup of Poland in 1996. Ryszard Debski, teacher from Biala Podlaska won the first one in 1995 and Pawel Dawidson, a student from Czestochowa, won the third one in May 1997.
We have been holding local tournaments since the beginning of this year.
We play polish SCRABBLE using the same board and basic rules as the original english version, but we use a different set of letters, of course.