YOU SAID:

it sure would be a shame if this sentence became unintelligible

INTO JAPANESE

この文が理解できなくなったら確かに残念だ

BACK INTO ENGLISH

It would be a shame if I could no longer understand this sentence.

INTO JAPANESE

この文が理解できなくなったら残念です。

BACK INTO ENGLISH

I'm sorry if you can't understand this sentence.

INTO JAPANESE

この文が理解できなかったらごめんなさい。

BACK INTO ENGLISH

Sorry if you don't understand this sentence.

INTO JAPANESE

この文が理解できなかったらごめんなさい。

BACK INTO ENGLISH

Sorry if you don't understand this sentence.