test-translation.php

<?php
/**
 * Plugin Name:       Tribe Events Extension: Test Translations
 * Version:           1.0.0
 * Author:            Modern Tribe, Inc.
 * License:           GPL version 3 or any later version
 * License URI:       https://www.gnu.org/licenses/gpl-3.0.html
 *
 *     This plugin is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     any later version.
 *
 *     This plugin is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *     GNU General Public License for more details.
 */

function tribe_modify_translation( $translation, $domain ) {
	$domains = [
		'tribe-common',
		'the-events-calendar',
		'tribe-events-calendar-pro',
		'tribe-events-filter-view',
	];

	if ( ! in_array( $domain, $domains ) ) {
		return $translation;
	}

	return $domain;
}

add_filter( 'gettext', function( $translation, $text, $domain ) {
	return tribe_modify_translation( $translation, $domain );
}, 100, 3 );

add_filter( 'gettext_with_context', function( $translation, $text, $context, $domain) {
	return tribe_modify_translation( $translation, $domain );
}, 100, 4 );

add_filter( 'ngettext', function( $translation, $single, $plural, $number, $domain ) {
	return tribe_modify_translation( $translation, $domain );
}, 100, 5 );

add_filter( 'ngettext_with_context', function( $translation, $single, $plural, $number, $context, $domain ) {
	return tribe_modify_translation( $translation, $domain );
}, 100, 6 );