Were these the only two languages that the banners were written in? Because if so, that could be seen as a political message, e.g. only speakers of Arabic and Chinese need to be reminded of this....
But with the variety of calligraphics, it could have been some more innocent art project four years ago, 'saved' by moving it into a weather-sheltered permanent place inside the railway station. *Lunatic*, n. One whose delusions are out of fashion.
(NB: Colloquial spoken Arabic and written Arabic are very different, and I know quite a few people who are the children of immigrants and have grown up speaking comfortably in Arabic but are completely unable to read it -- not even street signs, let alone calligraphy, which at its most ornate can be difficult for even fully literate native speakers to decipher....)
At any rate, they are lovely banners.
