On the contrary, disappearance of several languages is highly likely to cause the loss of national identity.
On the other hand, the language is an important aspect of one's identity. Therefore disappearance of a language means that one would loose his or her identity in terms of culture, community etc..For instance, people imitate not only clothing but also eating habit like Mc Donald or KFC and ignore their traditional food.I
.... well... give an example to suite your reason direct. Have an example that has a direct link with the language. This example is out of topic. :(
To sum up, extinction of several languages in globalizationareishighly considered highly problematic despite ofit, in a way, provides easier communication.
... this is not well written.... you need to re-phrase this line.