Greetings jisarit!

Surprisingly enough, *I* can help you with that. Actually I can't, but I can point you to some stuff that might help you figure out how to do it. http://manual.b2evolution.net/Localization is all about localizing your blog. But wow it's not easy looking to me. Oh and http://b2evolution.net/downloads/language-packs.html is a place to find translations done for versions ever since forever, meaning you might find that once upon a time someone provided a language pack for your preferred language.

And guess what. When you wade in to the localization process there are some folk here who can help you a lot with some of the details. Not me though. I'm a one-language guy and it happens to be the default language in this program. I know a bit about those smart people and I'll tell you this: try to learn how and try to do, then ask a question about the detail that is stopping you. THEN they will jump in and help you out as much as they can.

What language do you want your blog in? One of the easiest things to do is make it have the 'right' date and time format and have your flag shown (if your skin displays flags of course).