I stumbled upon a site that looks useful. There they have out-of-copyright classic books translated, sentence by sentence into different languages. You also get to read the text in two languages, side by side—in effect facilitating the Heinrich manoeuvre.
The site’s name is Weblitera. I’d like to make good use of it. The only thing is that I had a little problem registering for it. I contacted the owner and a person named Dmitry replied. We’ll see what happens.
There seem to be 12 languages represented, including English. No Japanese, Dutch or Polish as yet. Perhaps I can help.
Total: J375 D164 G66 P37 F31 Sp22 A8 M8 Da1 R1