基于出现在多个列表中的词的关键词检测

Question

我有一本类似的字典：

countries = ["usa", "france", "japan", "china", "germany"]
fruits = ["mango", "apple", "passion-fruit", "durion", "bananna"]

cf_dict = {k:v for k,v in zip(["countries", "fruits"], [countries, fruits])}

我也有一个类似如下的字符串列表：

docs = ["mango is a fruit that is very different from Apple","I like to travel, last year I was in Germany but I like France.it was lovely"]

我想检查docs，看看每个字符串是否包含cf_dict中任何列表( cf_dict的值是列表)中的关键字的any，如果存在，则返回该字符串(文档中的字符串)的相应key(基于值)作为输出。

例如，如果我检查列表docs，输出将是fruits，countries

类似于这个answer，但它只检查一个列表，但是，我想检查多个列表。