some of my favorite foreign films are Your Vice Is A Locked Room And Only I Have The Key directed by Sergio Martino which is a
giallo (Italian horror genre) film, i worry it may be a bit slow though. Deep Red directed by Dario Argento is also of the same genre and i really enjoyed it as well.
Fallen Angels directed by Wong Kar-wai (who is well known for directing In The Mood For Love, one of my top 5's) was also really enjoyable and is more niche than In The Mood For Love (although i super recommend In The Mood For Love as well). His movies are gorgeous too
they're both Hong Kong drama romances
I'm A Cyborg, But That's OK directed by Park Chan-wook (of Oldboy and Handmaiden fame) was super cute and sweet, i watched it a while back and i still think of it frequently! it's a Korean romance drama comedy.
House (Hausu as it's sometimes written) directed by Nobuhiko Obayashi is fairly popular but i'm still recommending it because i adore it. it's a Japanese horror film.
i also love Wetlands directed by David Wnendt which is a bit crude but is a German drama comedy