international romantic relationship
Refers to a romantic relationship between people from different countries, often involving cross-cultural dynamics.
International romance is tough because of the language barrier.
She writes about her experiences in an international relationship on her blog.
異文化交流 is cross-cultural exchange in general, not specifically romantic.
遠距離恋愛 is a long-distance relationship, which may or may not be international.
Compound of 国際 (international) and 恋愛 (romantic love).