YOU SAID:
Translation party certificate expired a fortnight ago
INTO JAPANESE
翻訳者証明書が2週間前に期限切れになりました
BACK INTO ENGLISH
Translator certificate expired 2 weeks ago
INTO JAPANESE
翻訳者証明書は2週間前に失効しました
BACK INTO ENGLISH
Translator certificate expired 2 weeks ago
That didn't even make that much sense in English.