YOU SAID:

Maybe I should throw in a few harder words, as this is translating quite well.

INTO JAPANESE

これはかなりうまく翻訳されているので、もっと難しい言葉をいくつか入れるべきかもしれません。

BACK INTO ENGLISH

This has been translated quite well, so you might want to include some more difficult words.

INTO JAPANESE

これは非常に上手く翻訳されているので、もっと難しい単語を含めることもできます。

BACK INTO ENGLISH

It has been translated so well that it can contain more difficult words.

INTO JAPANESE

翻訳が非常にうまく行われているため、より難しい単語を含めることができます。

BACK INTO ENGLISH

The translation is so successful that it can include more difficult words.

INTO JAPANESE

翻訳は非常に成功しているため、より難しい単語を含めることができます。

BACK INTO ENGLISH

The translation is so successful that it can include more difficult words.