saas-one/frontend/operation-web/ext/classic/locale/overrides/it/grid/locking/Lockable.js

Ext.define("Ext.locale.it.grid.locking.Lockable", {
    override: "Ext.grid.Lockable",

    lockText: "Blocca colonna", 
    unlockText: "Sblocca colonna" 
});