I commonly write mails in different languages and would like to have the spell checker function with that. Previously I have been using Thunderbird on both my macs and linux machines, but recently I have decided to give up on Thunderbird and try Mail.app instead (since Thunderbird isn't actively developed and apparently lagging behind).
In thunderbird you can have a combobox that allows you to choose a dictionary with which the software checks spelling. Is something like that possible for OS X Mail.app? I know the "Automatic detect" function but it doesn't seem to work particularly well beyond English (at least in my case).
Are there any plugins or anything like that?