aitorZ

<wpml-config>
  <shortcodes>
    <shortcode>
      <tag>gravityform</tag>
      <attributes>
        <attribute>id</attribute>
      </attributes>
    </shortcode>
  </shortcodes>
</wpml-config>

function wpmlsupp_7499_allow_translating_numbers( $is_translatable, $job_translate ) {
    $data = $job_translate['field_data'];
    if ( 'base64' === $job_translate['field_format'] ) {
        $data = base64_decode( $data );
    }
    if ( is_numeric( $data ) ) {
        return true;
    }
    return $is_translatable;
}
add_filter( 'wpml_tm_job_field_is_translatable', 'wpmlsupp_7499_allow_translating_numbers', 10, 2 );