a)
The graph shows that Chinese, Arabic and Russian in particular, are likely to be more important in the future as their rate of growth is very high.
Possible predictions are:
- In the future, perhaps English will not be the most dominant language.
- Chinese, Arabic, Russian and Spanish may become more important than English.
b)
- Chinese, because there is a huge increase in demand as the number of Chinese internet users increases.
- Arabic, Russian and perhaps Portuguese are also important to mention because of their huge growth rates.