Problem 1: The Site Title Is Global
Your site supports multiple languages using the "modern" single-tree aproach where one page has one or more translations in alternative languages. In Typo3 every page's title usually starts with the site title and the page title is appended to it. The page title can easily be translated by customizing the language-specific header fields. The site title, however, can only be set globally. Consider yourself lucky if your site title is universal across languages. Mine isn't. Furthermore, I like my site's title to contain main search engine keywords, i.e. the words I want my site to be found under in Google, Yahoo and so on.