Let me start by saying that Chuck Norris is a Tang Soo Do guy. I am thinking you might mean Ed Parker, who created American Kempo.
BlueCrab is right, the characters can translate. Hence, things like Ha Ki Do use the same characters as Aikido.
BlueCarb also touches on an interesting point. The Characters for Okinawan Karate Do before the turn of the century did translate into "way of the Chinese hand". Around the time that Funakoshi and others were introducing Okinawan karate to Japan (and Koreans), the use of the "China" character was "out of style". Funakoshi explains this in several books by saying that calling things "Chinese" was very fashionable in Okinawa during the 19th century. He goes on to day it is more accurate to use the character for "Empty". Funakoshi is the only source I have read up on regarding this change, but I do find it somewhat suspect that the character change occurs around the time that Okinawan karate is being exported to Japan.
While Whang Kee is often credited with creating TSD, it should be noted that there are a lot of the Kwan leaders that in some way associated their art with the name TSD. One thing is for certain, all of these Kwan leaders were trained in Okinawan Karate. Some were exposed to Funakoshi’s Shotokan others appear to have been exposed to other forms of Okinawan Karate like Shudokan.
Many people argue that the Japanese introduced Karate to Korea, the fact is, Okinawan Karate was being introduced to Japan during the occupation of Korea. They were exposed to it at the same time.
After, the Korean War, and things began to settle and progress politically, the South Korean Government made huge efforts to reestablish Korean culture. Part of this was to unify the Kwans and make them into something more, Korean. At this time, Korean Martial arts were being exported, but Kwan leaders not happy with the politics going on in Korea, and by US service men, like Chuck Norris. These people opened their own schools, and taught their art as it was. Some with the name TSD, or in some cases TKD, and in some cases as Karate. Meanwhile, back in Korea, Taekwondo was established as the “official art” and it has evolved into what it is today, a purely Korean art.
However, the other schools that had left Korea, have remained for the most part, like that had been in the 1950’s and 60’s; and more closely related to Okinawan Karate, than anything Korean. Are there subtle stylistic differences; yes, that’s what makes them Korean. Are they more closely related to Okinawan Karate than modern taekwondo; yes. Could one call it Korean Karate, I would say yes.
Case in point, I have been doing TSD for most of my martial arts life time. When I have ventured into other styles I have assimilated far easier into an Okinawan Karate school than a modern Taekwondo school. TKD as we see it today is a much different art whereas what I have been doing is much closer to what is still being done in Okinawan styles.