BookStack/resources/lang/cs/passwords.php

<?php
/**
 * Password Reminder Language Lines
 * The following language lines are the default lines which match reasons
 * that are given by the password broker for a password update attempt has failed.
 */
return [

    'password' => 'Heslo musí být alespoň 6 znaků dlouhé a shodovat se v obou polích.',
    'user' => "Nemůžeme najít uživatele se zadanou emailovou adresou.",
    'token' => 'The password reset token is invalid for this email address.',
    'sent' => 'Poslali jsme vám odkaz pro reset hesla!',
    'reset' => 'Vaše heslo bylo resetováno!',

];