I have one here and it is a shame that they screwed it up on the last meter. The game menu has 3 sub sections:
Simulation Games seem to be proper translated with Emulated Games, Transplant Games are Ported Games and TF Games, i assume is a link to the SD card.
Transplant Games are not translated into english, so you have a Chinese version of some silly ports (OpenGGS, Block Rage, The cheap game show "Car", Mr. Driller, Wolfenstein 3D, Hexen).
TF Games is probably a link to the SD card.
I'm not quite familiar with Dingoo, so i have no idea where i can find the config file in order to repair the links. The Gameboy and GBA Emulation is also as awful as on the RS97. Once the screen scrolls you see blocks on the right site.
Anyway the joystick and buttons are quite cool and the battery power is amazing. It lasts 2 hours and probably more.