YOU SAID:

I've never eaten a Taco nor an Octopus

INTO JAPANESE

私はタコスもタコ食べたことがないです。

BACK INTO ENGLISH

My tacos also Octopus is not eaten.

INTO JAPANESE

私のタコスもタコは食べられません。

BACK INTO ENGLISH

Taco's I also can't eat Octopus.

INTO JAPANESE

タコスにもタコを食べることができません。

BACK INTO ENGLISH

You can't eat the Octopus Taco.

INTO JAPANESE

タコのタコスを食べることはできません。

BACK INTO ENGLISH

You can't eat the Octopus Taco.