Mapping joined query result into Eloquent model - sql

Question

I have following database schema:
CREATE TABLE `languages` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`code` char(2) COLLATE utf8_unicode_ci NOT NULL,
`latin_name` varchar(60) COLLATE utf8_unicode_ci NOT NULL,
`local_name` varchar(60) COLLATE utf8_unicode_ci NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `languages_code_unique` (`code`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
CREATE TABLE `films` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`name` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
PRIMARY KEY (`id`),
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
CREATE TABLE `films_downloads` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`film_id` int(10) unsigned NOT NULL,
PRIMARY KEY (`id`),
KEY `films_downloads_film_id_foreign` (`film_id`),
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
CREATE TABLE `films_downloads_langs` (
`download_id` int(10) unsigned NOT NULL,
`language_id` int(10) unsigned NOT NULL,
PRIMARY KEY (`download_id`,`language_id`),
KEY `films_downloads_langs_language_id_foreign` (`language_id`),
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
I would get all Languages by film for films list and use it next like
foreach ($films as $film) $film->languages;
SQL query and following code in Laravel allow me get what I want, but
in flat array.
$q = DB::table('films)
->select('languages.latin_name', 'films.id as film_id')
->join('films_downloads', 'films.id', '=', 'films_downloads.app_id')
->join('films_downloads_langs', 'films_downloads.id', '=', 'films_downloads_langs.download_id')
->join('languages', 'languages.id', '=', 'films_downloads_langs.language_id')
->whereIn('films_downloads.film_id', $films_ids)
->groupBy('languages.id' ,'films_downloads.app_id')
->get();
I would nested arrays / collections / models (prefer), with grouping repeating languages in mysql for multiple films at one query. How I can fill Film models collection by languages collections?