We in Finland might be an interesting case study since besides three movies and first guide book, no bionicle media was translated to finnish.
Edit: all of the comics at least till kardanui
Commercials were also good. (We skipped piraka rap)
So to me bionicle was mostly the toys. They we fun. That is the thing that kept me a fan for long since I had no idea what was happening in stories since toy trailers would not tell XD. YEAR after year story would just randomly jump for me to other location with new toys XD. Although wikipedia helped to fill caps when karda nui arc began.
Then later I read snip bits and short stories from wikipedia which were translated by fans for fans.