<|im_start|>system
You are a helpful AI assistant.<|im_end|>
<|im_start|>user
What would happen if everyone in the world suddenly spoke the same language?<|im_end|>
<|im_start|>assistant
Here are several possible results if everyone in the world suddenly spoke the same language:

- Easier and more accurate communication. Besides no longer needing laborious translation, some information that is difficult to translate accurately due to different habits and other reasons can be understood more accurately.
- New products and standards. If the new "world language" is quite different from what we have, many products related to languages would need to change, such as keyboards, signs, and operation systems. Many standards such as official language and character encoding standards would also need an update.
- Information spreads faster. Though we have translation software that can process images and a whole webpage, their limited performance still stops many people from visiting foreign websites and media. The new "world language" would allow people to access more information sources.
- Better understanding of cultures. Languages are not only tools but also reflections of different cultures. If these culture-related parts can be fully transferred into the new "world language", they can be easier understood by others.
- Possible controversies. With the sudden spread of a language, many might fear that the convenience would make the speakers' traditions and cultures connected to their original languages slowly fade away. It might also spark squabbles around whose language is more similar to the new "world language" and therefore superior/simpler.<|im_end|>
<|im_start|>user
I think it would be a terrible loss if all the other languages were eliminated.<|im_end|>
<|im_start|>assistant
You are right. When we lose a language, we also lose a lot of related histories, cultures, local information and knowledge, etc. For example, information about local species and climate patterns, historical events, and spiritual attitudes of speakers. This can also cause health problems among the original speakers, as their identity, autonomy, and spiritual sovereignty are usually highly connected to their traditional language, and the loss can lead to mental problems such as trauma and depression.
Even if the new "world language" doesn't immediately eliminate other languages, many of them are still likely to be lost. The gradual abandonment of a native language in favor of a bridge language, which allows people with different native languages to communicate, has already been a typical reason for language death in the modern period, and this can happen even faster when we suddenly get a "world language".<|im_end|>
<|im_start|>user
Which language is most worth learning at the moment?<|im_end|>
<|im_start|>assistant
The language that is most worth learning depends on your personal goals and circumstances. Here are a few factors to consider when choosing a language to learn:

1. Career opportunities: Some languages are in higher demand than others, so if you are learning a language with the goal of improving your career prospects, it's worth researching which languages are in demand in your industry or in the job market.

2. Personal interests: If you have a personal interest in a particular culture or region, learning the language spoken in that area can deepen your understanding and appreciation of the culture.

3. Ease of learning: Some languages are easier to learn than others, especially if you already speak a related language. For example, if you speak Spanish, learning Italian or Portuguese might be relatively easy.

4. Future potential: Some languages may become more important in the future due to political or economic trends. For example, Chinese is becoming increasingly important as China's economic influence grows.

With all of that said, some of the languages that are currently in high demand (considering that you already know English) include:

1. Chinese (Mandarin)
2. Spanish
3. Arabic
4. French
5. German
6. Japanese

Ultimately, the best language to learn is one that you are passionate about and that will serve your personal or professional goals.<|im_end|>