Does anyone have experience setting Web Chat on Service Cloud?

I'm facing with the current situation:

• implement Web Chat for multiple URLs
• Implement Web Chat for different languages

1 Question: Is it possible to use 1 single code snippet to add for several URLs? During the process of setting up the Web Chat, you should specify the URLs of the web site where you need to paste the code into the  HTML editor. If I have 5 website, do I need to create 5 web chat configurations with 5 codes or it is possible to use just 1 and paste into all the URLs?

2 Question: Instead of asking to the customer on the chat session from which country he/she is typing, it is possible to know a parameter (like, language, country) to enroute throught the right queue?

3. We use Person Accounts and Lead. Are there any restrictions to keep in mind? Like relating a case with a person account or a Lead? it is possible?

4. Is it possible to integrate a chat web with a custom process (when a new case is created from a web to case it has been created automatically a Lead). In case agent is offline, we would like to create a case with a Lead.

Thanks in advances

Sabrina