YOU SAID:

i like pizza or tacos and cannot decide

INTO JAPANESE

私はピザやタコスが好きで、決めることはできません

BACK INTO ENGLISH

I like pizza and tacos and I can not decide

INTO JAPANESE

私はピザとタコスが好きで、決められない

BACK INTO ENGLISH

I like pizza and taco, I can not decide

INTO JAPANESE

私はピザとタコスが好きです、私は決めることができません

BACK INTO ENGLISH

I like pizza and taco, I can not decide