Is tak just a short form of tidak?
In daily speech other words are used as well: enggak, nggak, gak...
Tak is "no" for Indonesian, while it is "yes" for Polish. And their flags are even mirrored to each other :D
Tak! I also noticed that! clap clap clap
And if you take a Polish "tak" and insert in it the Indonesian ID ("id" happening to be the ISO code for "Indonesian"), thou also get an Indonesian "tak" (tIDak) :D