I am told;
You can translate a block of text up to 150 words and conduct a search based on translated text. Users can also enter any URL into a "Translate a Web Page" box to convert the text of an entire Web page. In both instances, users select from an extensive list of 38 language pair choices. In addition, Babel Fish one click translation is available through the a button that can be added to the Yahoo! Toolbar.
In addition, Yahoo said they have made enhancements to the translations technology that enables "Simplified Chinese to be translated into Traditional Chinese and vice versa with high accuracy." Also, France and Germany users have an additional feature named "Search Translator," a feature that "searcher's queries and looks across the entire Web in multiple languages to find the most comprehensive set of relevant results. Yahoo! Search results are returned on one multi-lingual page."