There are close to 7, 000 languages spoken on Earth. However, it's estimated that by the end of this century, up to 50% of them may be lost.
It's commonly thought that majority languages tend to be valued for being useful and for promoting progress, while minority languages are seen as barriers to progress, and the value placed on them is seen mainly as sentimental (感情用事的). But is sentimentality really the only motivation for preserving language diversity?
Speakers of endangered languages often live in remote areas with unique landform. It is quite common for these languages to distinguish between hundreds more types of plants and animals than those known to modern science. For example, in Southeast Asia, some tribes have discovered the medicinal properties of over sixty-five hundred plant species. This has led to many of landmark achievements in medicine.
It was once believed that the limits of one's language defined the limits of one's thought. This theory, called the Sapir-Wharf hypothesis (假说), has been largely rejected in favor of the improved version, which assumes that the language we speak does not set the limits of our thoughts, but it does direct our focus in certain ways. For example, English is a tense-based language. It's nearly impossible to talk about doing something without specifying the time — i. e. I went to the party(past), I'm going to the party(present), or I'll go to the party (future). This differs from Chinese, where it's perfectly reasonable to say, "I go to the party" without defining the "when". Thus, part of the richness of language is that it allows us to organize the world in so many unique ways.
Some languages categorize the world in ways so different from our own that they are difficult to conceptualize (概念化). The United States employed native Navajo speakers to create a system of message coding during the Second World War. The Japanese were never able to break it, and the "code talkers" are often cited today as having helped decide the outcome of the war.
As we've already seen, minority languages are valuable for many practical reasons. In conclusion, I'd say the short answer is yes — dying languages are certainly worth saving!
