Questions about using – WorldPenScan Series

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I accidentally switched the UI of WorldPenScan Go to a language that I cannot understand, how can I switch it back?
I see a strange screen after booting up, what should I do?
What should I do if the text cannot be sent to the software on Mac OS after scanning
Why do I have the delays, failures, etc situations while using functions such as live translation and dictionary lookup?
How to add sentences / words to bookmarks on the APP and manage them?
Can I continue to use the pen scanner while charging?
The recognition rate of text scanning is not high, how can I improve it?
Why is the translation result incorrect when using the Dictionary Lookup / Instant translation?
When use Live Translation, a message "Sorry, no voice received, please approach the microphone and try again" appears. How can I improve it?
In the Instant Translation function, how to translate multiple lines at a time?
If the touch screen does not respond, how can I resolve it?
What are the available functions when not connected to the Internet?