Hi jean.
I've seen that Playrix have done this before - "gifted" towns to players that they don't belong to! Unbelievable in my opinion because they insist that their game is secure
You can change the language by going to settings (small blue cog wheel in the top left hand corner) and pressing this:
Screenshot_2020-04-16-11-34-25_kindlephoto-683956970.jpg
The top box option will change your settings to English
Screenshot_2020-04-16-11-34-48_kindlephoto-684033525.jpg
Then press ok (green button) at the bottom.
You can then contact Playrix from the game telling them this is NOT YOUR TOWN!
I would advise you not to play on this town because there is probably some poor person in China (or elsewhere) thinking that their game has been hacked by you!!!
Really hope you get your town back, and shame on Playrix
Good luck.