Elementor Form Validation - Block non-english bots

functions.php

/**
 * Checks form textarea content is english to reduce spam from non-english bots
 **/
function elementor_form_message_field_validation( $field, $record, $ajax_handler ) {
  // Let's check the message field only
  if ( empty( $field ) || empty( $field['message'] ) ) {
		return;
	}
  // Validate content format by language
  $string = $field['message'];
  if(strlen($string) != mb_strlen($string, 'utf-8'))
  { 
    $ajax_handler->add_error( $field['message'], esc_html__( 'Please enter English words only thank you.', 'elementor' ) );
    return;    
  }
}
add_action( 'elementor_pro/forms/validation/textarea', 'elementor_form_message_field_validation', 10, 3 );