MU Plugin that prevents WordPress of creating .l10n.php files for specific textdomains

lmdm-disable-l10n-php.php

<?php
/**
 * Plugin Name: LMDM Disable PHP Translation Cache for Selected Plugins
 * Description: Forces WordPress to use .mo files instead of .l10n.php translation files for selected plugin textdomains.
 * Author: Nic Bug / LMDM
 * Version: 1.0.0
 */

defined('ABSPATH') || exit;

add_filter('translation_file_format', function ($preferred_format, $domain) {
	static $domains = [
		'soft-hyphen-inserter'        => true,
		'pdf-preview-inside-file-block' => true,
	];

	if (isset($domains[$domain])) {
		return 'mo';
	}

	return $preferred_format;
}, 10, 2);