There are many things that I disagree with in both the graph and you argument
>The limit of Language's development
By this I'm going to assume that you mean the languages that will come to be more widespread. now for your choices for those languages:
>Future : English, Japanese
English is already a common language used for trade, diplomacy, entertainment and a whole plethora of other industries. I could agree that it will continue to dominate until the US is no longer a dominating world power. Japan, while a leader of the "Asian Century" will soon be overshadowed by China, which is something I will go over later.
>Modern : German
I don't really understand this pick. German is the 11th most spoken language rarely spoken outside of Germany and its ex-colonies.
>Middle : Europe, Russian
This is a very broad category, I might agree with it if it was better defined.
>Ancient : Asian
Assuming that this means Sino-Tibetan, China would not be this far down. China's economy surpassed Japan's seven years ago, Mandarin Chinese has the largest number of speakers in the world, and China gives a collosal amount of foriegn aid to the countries in Africa that it is put on the same level as.
>Prime : African
There are way more language groups.
For the "immigrant's problem," this is a very oversimplified model, which has very little to do with Safeness and Sociability, which you claim is the reason Japanese will overtake English. While it is true that Japan has better rates of crime, poverty, unemployment, and homicide (Rates that are also shared by South Korea, Taiwan, Hong Kong, Macau, Singapore, and China.) than the US, that alone will not draw the immigrants that you claim stop the less developed countries from developing. Every East Asian country is incredibly homogeneous.
I don't really see how that relates to Safeness and Sociability.
English > Japanese