YOU SAID:
Let's have a translation party!
INTO JAPANESE
翻訳パーティがあてみましょう!
BACK INTO ENGLISH
Translation party is let!
INTO JAPANESE
翻訳パーティをしましょう!
BACK INTO ENGLISH
Translation party!
INTO JAPANESE
翻訳パーティー!
BACK INTO ENGLISH
Translation party!
That didn't even make that much sense in English.