Localized binaries not working for some locales

When testing GetTor, I get links for en-US binaries even when I request a different locale. I've checked that the requested locales are available so I think there is a bug in the email processor. The following locales are processed correctly:

• en to en-US
• pt to pt-BR
• es to es-ES

However, I tried ru, ar, and fa and these all sent me en-US links.