The Spanish word is "pulpo."
su pulpo
octopus: ikhTabuT (اخطبوط)
Yes. One of the most popular dishes at Spanish pubs is "pulpo al gallego" or "Galician octopus". Octopus meatballs are also quite common.
tako
Tintenfisch.
bob
octopws
octopi
Some traditional dishes that feature cooked octopus as a key ingredient include Spanish pulpo a la gallega, Greek grilled octopus, and Japanese takoyaki.
章鱼 [zhāng yú]
Who knows. It's impossible to say.
In Bengali, octopus is called "মহাসাগরীয় গন্ধরাজ" (mohasagoriya gondhoraj) or simply "অক্টোপাস" (octopus), which is a transliteration of the English word. The term is used in both conversational and scientific contexts.