I regret to inform you that the requiring documents are still being processed, I will notify you as soon as the process is completed via email.
不要字面上翻译没有准备好,避免出现not ready这种让人觉得你们很没有准备的话。建议翻译成还在准备当中。
I'm sorry but the document you need is not ready yet. I will e-mail you as soon as possible once the document is ready. Thank you!
I am so sorry that the documents you need is not got ready yet. I will invoice and pass to you by e-mail as soon as it get ready. thanks a lot
翻译成日语?