+'error.auth' => 'Nume de utilizator sau parola incorecta.',
+// TODO: translate the following.
+// 'error.user_exists' => 'User with this login already exists.',
+'error.project_exists' => 'Proiectul cu acest nume exista deja.',
+// TODO: translate the following.
+// 'error.task_exists' => 'Task with this name already exists.',
+// 'error.client_exists' => 'Client with this name already exists.',
+// 'error.invoice_exists' => 'Invoice with this number already exists.',