How do I fix #1062 error received while importing EE database to localhost from remote server
Your local table is likely not empty, thus the error when conflicting with existent data. If you do not want to keep any of the current data, you need to delete all rows before the insert. One fast way to do that is with:

TRUNCATE TABLE exp_accessories;


Usually, mysqldump will drop the table before import, like this:

DROP TABLE IF EXISTS `exp_accessories`;


Regarding French, client sessions can change the default language setting by doing SET lc_messages = 'en_US'; and receive error messages in a different language.