The following review written by one of the Software Informer contributors applies to version 4.0
The Bat! International Pack 4.0.36 is a program to localize your The Bat! mail client. This Pack installs the multilingual interface and the spell checker dictionaries for languages other than English.
This way, you can use spell checkers in Danish, Dutch, Finnish, French, German, Italian, Norwegian, Portuguese, Russian, Spanish, Sweden and Ukrainian. Should you need to write email in those languages, the spellcheckers will scan the text you write, and suggest corrections if they found any mistake. The interface can be displayed in English, Russian, Romanian, Ukrainian, Polish, German, Dutch, Spanish, Swedish, Italian, Czech, Portuguese, Chinese (Traditional and Simplified), French, Turkish, Serbian (Latin and Cyrillic), Slovak and Croatian. The different versions of The Bat! have different corresponding versions of the International Pack. The program itself offers to download the right IP for your email client, when you enter in the Options/Languages option. If you click there, you will be redirected to the International Pack download page.