> In the case of Wordle, you know the exact set of letters you’re going to be using
This holds for the generator side too. In fact, you have a fixed word list, and the fixed alphabet tells you what a "letter" is, and thus how to compute length. Because this concerns natural language, this will coincide with grapheme clusters, and with English Wordle, that will in turn correspond to byte length because it won't give you words with é (I think). In different languages the grapheme clusters might be larger than 1 byte (e.g. [1], where they're codepoints).
As the parent said:
> In the case of Wordle, you know the exact set of letters you’re going to be using
This holds for the generator side too. In fact, you have a fixed word list, and the fixed alphabet tells you what a "letter" is, and thus how to compute length. Because this concerns natural language, this will coincide with grapheme clusters, and with English Wordle, that will in turn correspond to byte length because it won't give you words with é (I think). In different languages the grapheme clusters might be larger than 1 byte (e.g. [1], where they're codepoints).