1. English, French, Chinese, Spanish, Russian, Arabic. These languages are used globally and serve as a medium of communication in international interactions. However, it is important to note that there is no single language that is universally spoken across the world. Instead, there are languages that have a higher degree of universality, with English currently being the most widely used.
2. The languages that are most commonly spoken across the globe are those that were spread by historical conquerors during the age of imperialism. As these powers colonized various regions, they introduced their languages to the conquered territories. Many of these territories' indigenous populations had less developed languages, and thus adopted the languages of their conquerors.
3. The languages that act as a global lingua franca are products of the long histories of specific nations. They have evolved over time and have been shaped by the diverse experiences of their speakers. Consequently, these languages have various limitations and shortcomings.
4. From a theoretical perspective, these languages are considered to have low scientific value. They reflect the cultural, social, and historical contexts from which they emerged, which can impact their effectiveness as tools for global communication.
温馨提示：答案为网友推荐，仅供参考