No speedometer and gear changing animation in WTCC cars and Chinese translation issues

Just finished my 125 nurburgring endurance run.
I got so confused in cockpit view because that I couldn’t tell how fast am I going by looking at the dashboard in front of me. I want to see them on dashboard instead of on the HUD.
There is more, when I changed gear, the driver didn’t seem to like making any movement. He just changed randomly, sometimes he did and sometimes didn’t.
The rev light did’t work properly as well, the red light didn’t turn up at all!
Are these problems I encountered already known?
As a Chinese player in mainland, I have to use Traditional Chinese or English language settings because the translation of Simplified Chinese is way to poor to use. Some name of manufactures are translated into Chinese brand, and others don’t, thus you get a chaos in manufacture tab.