YOU SAID:

This sentence will translate into Japanese and back to English without flaw

INTO JAPANESE

この文章は日本語に翻訳され、問題なく英語に翻訳されます。

BACK INTO ENGLISH

This sentence will be translated into Japanese and translated into English without problems.

INTO JAPANESE

この文は日本語に翻訳され、問題なく英語に翻訳されます。

BACK INTO ENGLISH

This sentence will be translated into Japanese and translated into English without problems.