Translation instruction to Arabic

Hello,
I hope all is well.
A few questions please.
1. Is there an Arabic translation to Membership Pro plugin?
If not, please include instructions to how to do that.

2. How can I change what appears on the page based on the language using
if lang= en then xxx and if Lang=ar then yyy

3. Is there a way to change who can access the existing pages and post?

4. I want to integrate Mailchimp with Membership Pro. Is there a way to have each subscription plan send data to a different List in Mailchimp? Is there a way to insure not allowing duplicate registration?

On a different note:
What plugin you recommend to speed up the page loading time? What plugin you recommend which add Tags to posts automatically?

Thanks a million for your time.
George