Hi,
1. Yes. Different templates will be used depending on the users locale in the Service Manager database. If notification is going to a user with a russian locale, Service Manager will use the template written in russian etc.
2. No. Supported languages in SCSM2010 is listed below, and afaik the same languages is supported in 2012.
English
Chinese_PRC
Chinese_Taiwan
Czech (Czech Republic)
Danish (Denmark)
Dutch (Netherlands)
Finnish (Finland)
French
German_Standard
Greek (Greece)
Italian_Standard
Japanese
Polish (Poland)
Portuguese (Brazil)
Portuguese (Portugal)
Russian
Spanish_Modern_Sort
Swedish (Sweden)
Turkish (Turkey)
Regards
//Anders