Windows Phone 7.5 CR3 (Tango) Language Support

It has been said that nearly 120 languages will be supported in WP Tango. But I cannot find any farther information on this point anywhere. I have some questions regarding this.

1. What is meant by "language support"? Does it mean that key-board for all these languages will be available(read-write), or just ability to read in those languages, or the whole system can be changed into said language?

2. I understand that if it is anything more than "read" support, as in ability to read a webpage in said language, OEMs may remove most languages for localized devices. I want to know that even if additional keyboards are removed, if the ability to read in those languages will remain?

3. I am seeing news of Tango build being pushed and being leaked and customs ROMs. Can anyone please find out personally what additional languages are supported? I am particularly interested about my native tongue, Bengali/Bangla. This site is written in Unicode Bengali/Bangla, http://gaanerkoli.blogspot.com/ (This is a safe site, I promise!). It would be appreciated if anyone could check, please.

Thank you for your patience.