I notices that everytime i slide the word "slide" in the upper right middle is in RUS!
Here a Screenshot: http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=949063001

Edit: I also notices that the word "Combo" is also in RUS. I wasn't able to do a screenshot so fast.
The german word would be "Kombo".
I hope i could help.

Edit 2: I found the root of this problem. It's the "GuiGame.German.TXT" in folder "Hover\Hover_Data\StreamingAssets\Languages".

The words for Flip,Slide,Grind,WallSlide and Combo are in RUS instead of GER. But i would stick with the ENG version of the words. It sound way cooler in english ;)