Copy .thunderbird from i586 to x86_64

Can I copy my .thunderbird from an i586 to a X86_64 system?
On some of my Mageia partitions the spell checkers work for all languages I use, in others only for Dutch and English, even though I have all needed Thunderbird language packs installed. I did download some separate dictionaries for Thunderbird, but that didn't work for French.
Although I do have a "spell check works with all languages" Thunderbird on a X86_64 test partition, it doesn't contain any of the real mailboxes I use.
On some of my Mageia partitions the spell checkers work for all languages I use, in others only for Dutch and English, even though I have all needed Thunderbird language packs installed. I did download some separate dictionaries for Thunderbird, but that didn't work for French.
Although I do have a "spell check works with all languages" Thunderbird on a X86_64 test partition, it doesn't contain any of the real mailboxes I use.