extjs-gpl/classic/locale/overrides/es/form/field/ComboBox.js

GPL licensed version of Sencha Ext JS

Ext.define("Ext.locale.es.form.field.ComboBox", {
    override: "Ext.form.field.ComboBox",
    valueNotFoundText: undefined
}, function() {
    Ext.apply(Ext.form.field.ComboBox.prototype.defaultListConfig, {
        loadingText: "Cargando..."
    });
});