It uses the list of all of the words that can be in Wordle, and there are so many words I can't imagine anyone guessing. And I come from a family with large vocabularies.
https://puzzlist.com/stackdown
It's from the person who made https://wafflegame.net if you are familiar with it, one of many that came on the tails of the original Wordle.
In comparison, the Stackdown is less rushed and way more rewarding when solved. Also, more interesting in structure.
The most direct thing we can say is "no, because there is no such word as valew". It's not in Merriam-Webster, it's not in Samuel Johnson's 18th-century dictionary, it's not in the Collins dictionary (for British English).
It is in the Oxford English Dictionary, where it is noted as a "[spelling] variant of value" from the 14th century. It has never been a word with any other meaning than that of value, and using it now would be a pure error if someone used it, which obviously nobody will ever do. Accepting it in Wordle makes as much sense as accepting vvest on the theory that that was an acceptable spelling of west in the past.
There is an etymological connection between Portuguese valeu and English value, in that they both descend from Latin valeo, but value has no sense of gratitude or satisfaction. (I'm guessing the blog author was misled by https://en.wiktionary.org/wiki/valew#Portuguese , which says that valew is Portuguese internet slang for valeu.)
https://en.wikipedia.org/wiki/Crosswordese
Really no harder than memorizing all the 2 and 3 letter words in Scrabble and many players will pick most up in a few months.
I'm more proud of a later word game that you can play free at https://wellwordgame.com/en If you give it a try, let me know what you think!
Then in January 2022, the NYT bought Wordle, and started tweaking both lists, first shrinking the secret word list to 2309 entries, but leaving the logic otherwise intact. Fast forward to today, I looked up the current code [1], and it seems that there are now 14855 allowed words. The first 12546 are ordered alphabetically (0: "aahed", 12545: "zymic"), and the next 2309 are not. This may suggest that the latter are the secret words, but the logic for picking them has changed: I found no obvious sequence, when compared to the last few days' secret words. So it's either a more complex sequence, or the secret word is picked server-side.
In any case, I guess they decided to re-shuffle the list now at day 1689 / 2309 in order to avoid giving particularly assiduous player an additional bit of information: they can exclude all previous secret words. (To be accurate, I think this would be 1.897 bits, but my information theory is rusty.)
[1] https://www.nytimes.com/games-assets/v2/9003.896ec900f2a1ce8...
Ive been able to solve it by slowly injecting more challenging words over time, which has the side effect of also introducing a difficulty gradient. Players seem happy so far :)
I spent approximately as much time on building the word list as I did developing the game. The author's technique of just grabbing a word list and spellchecking it is completely not sufficient, you will get so many weird unfamiliar words in there. In the end I was able to whittle down my list to about 24,000 using various automatic methods, but from that point I just had to do a manual review on the remaining list, which meant I got to see a lot of words, and many of them felt very obscure and/or not fun.
1: shameless plug: https://wheybags.com/turntiles
https://www.oed.com/search/dictionary/?scope=Entries&q=ooh
"Ooh" is most certainly a word. As is both "Ah" and "Aah" https://www.oed.com/dictionary/ah_int?tab=factsheet#8068455