Customize content attributes in SearchWP's engine configuration

functions.php

<?php

// Customize the 'Excerpt' label for Posts in SearchWP's engine configuration
add_filter( 'searchwp_engine_content_type_label', function( $label, $context ) {
	if ( 'post' === $context['post_type'] && 'excerpt' === $context['supports'] ) {
		$label = 'Abstract';
	}

	return $label;
}, 10, 2 );