Yes I do, it was a Commodore 64 cartridge called "Black Box 8". And it spoke Polish with the right accent with all the sounds not present in English etc.
I read back then that it was domestic Polish make, but back then there was no such thing as IP protection so it is very likely it was based on work of Denic Klatt(same as DECtalk). When I heard some DECtalk recordings in a youtube video not long ago it immediately reminded me nded me of Commodore 64 Black Box 8. Although DECtalk spoke in English and black box 8 spoke in Polish there is some similarity that can be heard in their voices(not pitch - this was a user setting, but more of a rhythm if it makes sense)