akaunting/resources/lang/pl-PL/transfers.php

<?php

return [

    'from_account'          => 'Z konta',
    'from_account_rate'     => 'Z rachunku',
    'to_account'            => 'Na rachunek',
    'to_account_rate'       => 'Na rachunek',

    'messages' => [
        'delete'            => ':from na :to (:amount)',
    ],

];