Hi old_man:
About your question:
1. “One of the most important factors for us is the lack of a word library to put on the screen. We need it to change the language of the words and information displayed. Has it changed or can it be arranged in different ways?”
You can create several Unicode fonts and use the description pointer function to change the fonts by sending commands through the UART interface.
2. Is it also possible to upload graphics or other ways to control the display from ESPPresiv to ESP32 level?
Yes, you can use the 85 commands to write the pixel information directly, or download the file via UART. See Chapter 2.Extends the command 0x85 for more details.