Occasionally you may need to revert your controller back to English. Here is how to do it. The menus may vary by model and firmware so this may differ slightly from your controller. You can usually find the menu tree with descriptions in the manual.
Controller with Z/U button and no separate Z axis buttons:
1. click “Z/U” button
2. select “语言设置”and then press “Enter” to confirm
3. select “英文”and press “Enter” to confirm
Here is the manual for the Ruida DSP: Ruida RDC644XG Controller User Manual
Controller with Menu button and separate Z axis buttons:
1. click “Menu” button
2. select “语言设置”and then press “Enter” to confirm
3. select “英文”and press “Enter” to confirm