Sometime back I had compiled a few sets of repetitive data like Country Names, Timezones and Language Names that are regularly used across various translation projects. The information is seldom required to be changed. Since these are mostly proper nouns, the important part is correct transliteration according to pronounciation and consistency of spellings. The translation or rather transliteration was done after checking the following:
1. key to pronounciation in the encyclopedia
2. existing Bengali version if any
The result is up for RFC at my document repository, under Bengali Localization Resources.
The PDF and .po versions for Country Names, Language Names and Timezones are available as well.
Through Myopic Eyes 