Translation BuddyPress, wp-events-plugin.com, membership

Hello,

WP MU environment is hosted on
(Bitnami install on Windows 2012 hosted in Azure)
BodyPress installed
Event Manager plugin is used
http://demo.wp-events-plugin.com/
Membership WPMUDEV

I have the following questions.:

- Translation into Hungarian (later to other languages)
* how can I manage translation of WPMU sites
* how can I translate BuddyPress
* how can I translate wp-events-plugin.com

- Do you know about any other website that uses these functionalities
- I decided to use wp-events-plugin.com instead of Events+ any comment on that

Thank you!
Bela