I have created a guide to help users of the Radioddity/Baofeng RD-5R handheld, DMR amateur radio create codeplugs for their radios.
Version 3 of this guide combines and updates two previous guides into a single document.
W9LW’s RD-5R codeplug programming guide
Can’t find original firmware, new versions all coming up as chineese I think for Radioddity RD-5R
Have you tried https://www.radioddity.com/pages/radioddity-download? Is your problem that the CPS software appears in Chinese, or the radio’s display, or both? If it’s the radio’s display, you have to change that on the radio. To do that, turn the radio off and then, while holding down the Menu, 5, and 9 keys (all three) turn the radio back on. This should switch it back to English.