对,楼主理解是正确的
English is the language which I am interested in.
或者in提前到which前面 English is the language in which I am interested.额提到前面可以吗。可否说下原理？·可以呢引导词是which 在英语定语从句中 就有 介词+which 这样一种语法举个例子This is the school in which I have studied for five years.这就是那间我学习学了5年的学校./ 这就是那间学校,我在那学校学习学了5年.