I think it fine, neologism had occurred in Wikipedia several times. One example, in the past, we used to name the catorgy as "Wars of Vietnam", but later someone gave new idea and requested the move to "Wars involving Vietnam" and everybody agreed. And not just South Vietnam used "Republic" in its name, the Democratic Republic of Vietnam and Socialist Republic of Vietnam also use "Republic" in their names and call themselves "Republic." It might be confused at first, but later people will distingush and get use to it. I took the idea from List of countries by date of transition to republican system of government. We don't have to mention too much about the 20th century. Like other periods, the 20th century is just a small portion of the whole national history. I want make all periods to be balanced. Look at same examples such as Template:History of Austria, Template:History of India, I have to say they mention WAY TOO MUCH about the 20th century. While we only need to mention main periods. I definitely want to the template to be shortened and less emphasis put on post-19th century stuff.