What is the foreign language written in China's hard pen calligraphy?

Of course, you can write English fonts with a brush. But if you want to write well, the requirements are higher and you need skilled pen skills. This is Chen Zhenlian's letter to g20. ? Chen Zhenlian is a representative of academic school, while Cao Li's official script is simple and complicated. As for the letters outside, I don't know what language it is, but there are several countries.