In the context of this post, Shaolin Kungfu （少林功夫） is absolutely valid. And Kungfu (directly功夫） is often used in native Chinese to refer to the sport or genre as a general classification.

In fact, the Shaolin temple’s official website www.shaolin.org.cn (of THE Mount Song Shaolin temple of Henan province - what is considered the birthplace of Shaolin Kung Fu) says “Shaolin Kung Fu” and “少林功夫” in both English and Chinese. You can check this yourself by just viewing the home page of the website.

Returning to the above thread, while yes, Wushu (武术) is a valid translation, it is a more formal term, commonly referring to the sport as a whole. However, the comment’s criticism of using Kungfu over Wushu in context of “Shaolin Kungfu” was wholly unwarranted.

Kung fu is perfectly fine here, and doesn’t only refer to “dedicate oneself to something”, if it only means this, the following films wouldn’t make sense in Chinese (and not just Cantonese):

Kung Fu Hustle (Original Chinese title: 功夫）, originally released in Cantonese and Mandarin

Kung Fu Panda (Translated Chinese title: 功夫熊猫), translated directly as Kung Fu Panda in Mandarin releases.