Right. I started playing 'hello wordl' = https://hellowordl.net/ and she uses a Scrabble dictionary as word source. Then I found Wardle's site. Only yesterday I downloaded his site and found the list of words hard-coded in the script. So you found that, and counted frequency from there, huh?
Yeah, I just looked at the source code, the list's always been in plain text there. And even if it had been garbled in the code somehow for obfuscation, the JavaScript (being run client side) needs the word list to function, so with a browser's dev tools you could just tell the script to list the dictionary it has decoded, so any such obfuscation would be pointless.