What to use when translating a site

Hi all,

I am trying to translate my site to japanese and chinese. I have installed i18n, l10n_client, translation_overview and translation_table and now I have translation options all over the place on my site and I am so confused....

What do we really need to translate a site? I think I might have installed more than I need to get the job done and this is not a good thing. Please let me know which are the only modules that I need so that I can remove the rest...I think i am not even clear about how internationalization work in drupal, can someone tell us the concept of how it works? it looks like translating the menus is a completely different task from translating the content, and when you download the .po files you can everything including strings from the admin interface which you dont really need to translate for yourself. All I want to do is to translate what the users see (pages, menus, blocks etc) and am hoping that I can do this from one place