APT doesn't include the system's language package when installing Thunderbird

[Mathieu Lawnik <mlawnik@free.fr>]

Hello,

I hope I'm posting this to the right mailing list.

In Debian strech, when installing Thunderbird with apt, the language 
package for Thunderbird matching the system's language isn't installed. 
It has to be installed manually. Could it be installed automatically 
with the thunderbird package ?

Thanks.