To help tailor further information, what specific of the Sunplus chip are you working with? If you want, let me know what specific changes you want to make (like changing a logo or fixing a remote control) so I can guide you to the right tools. Share public link
Cheap Chinese devices often have terrible English translations or missing languages. The editor lets you extract the lang.bin file, edit the UTF-8 strings in a hex editor, and repack it.
The Sunplus firmware editor is not a piece of software for casual users. It is a specialist’s tool for specific scenarios:
The storage partitions for the background audio and images displayed during boot-up or radio playback.
: Users can change the "boot image" or startup logo that appears when the device is turned on. IR Code Modification