This is the 8337th most frequent Chinese word.
louis
The word "Louis" is not a native Chinese word; it is a transliteration of the French name "Louis" into Chinese.
In this sentence, '路易斯' is used as a proper noun, indicating someone's name to refer to their actions.
路易斯今天去了图书馆。
Louis went to the library today.
Here, '路易斯' is used as a subject in the sentence, where its interests are being described.
你知道路易斯喜欢看小说吗？
Do you know that Louis likes reading novels?
In this example, '路易斯' appears as an object of the preposition, regarding whom the action of discussion is directed.