YOU SAID:
I swear that if Levi dies I'm not watching Shingeki ever again
INTO JAPANESE
レヴィが死んだら、二度と進撃を見ないことを誓う
BACK INTO ENGLISH
If Levi dies, I swear I will never see the advance
INTO JAPANESE
レヴィが死んだら、私は前進を見ることは決してないだろうと誓います
BACK INTO ENGLISH
I swear I will never see progress if Levi dies
INTO JAPANESE
レヴィが死んだら進歩は見られないことを誓う
BACK INTO ENGLISH
I swear that no progress will be seen if Levi dies
INTO JAPANESE
レヴィが死んだら進歩は見られないことを誓います
BACK INTO ENGLISH
I swear that no progress will be seen if Levi dies
That didn't even make that much sense in English.