I just learned about this program a few minutes ago. And it seems that this program cannot translate the contents of the file ?? Previously I used Foxitsoftware, I can translate the language I need by blackening the text, the program will automatically display the text content in the language I previously installed. It is similar to translation extension. It is really great to use if there is additional translation support. I believe it will support a lot of people when reading their files.
There’s an older closed issue on GitHub and a newer open one:
The developer’s response is clear:
Unfortunately I don’t know of any freely available translation tool we can use. Google translation API is not free.
So if you know of any free translation tool or API (with appropriate usage license) that can be called from Sumatra, do let us know.