YOU SAID:
I will eat a massive, scary duck today
INTO JAPANESE
今日は大規模で怖いアヒルを食べる
BACK INTO ENGLISH
I eat a large and scary duck today
INTO JAPANESE
今日は大きくて怖いアヒルを食べます
BACK INTO ENGLISH
I eat a big and scary duck today
INTO JAPANESE
今日は大きくて怖いアヒルを食べます
BACK INTO ENGLISH
I eat a big and scary duck today
That didn't even make that much sense in English.