employment documents to submit

I received a letter stating that I have to submit updated experience letter and other employment related documents. I am working in Italy and now all documents such as employment letter, work contract and salary slips are in Italian language.

I have two queries:
1. Can I submit photocopies of work contract, employment letter and salary slips in Italian language? And along with these documents, shall I submit an experience letter from my company in English language? Will it work? Or I have to translate all documents from Italian to English? If I have to translate documents then do I need to do it from authorized agents and validate those documents from Embassy? How it works? Can you please give me details on it?

2. Can somebody send me format of experience letters and reference letter to send to CHC? You can either post it on this forum or mail me on cpu0079lyahoo.com.

Thanks in advance.

Regards.