@Glomoro Hm... I fear I'm kinda lost. That one is in my To Read list (I'm holding back for some comments about drama, or MC being stupid or something, can't remember), but as of now I haven't read it, so I'm not sure what you mean.
The concept of "one" is still gonna be "one" even if it's written with different characters instead of a 1
Of course. But isn't that the very point?
"One" will be "one", regardless of whether you write it I, 1 or 一. And "six" will be "six" regardless of whether you write it VI, 6 or 六.
The thing is, the first basic point is the base. When do we start "recycling" the numbers? Base ten? So 0-9 and then 10? Base 4? So 0-4 and then "five" would be...uh...01?
Sorry I can't explain this properly, never been good with numbers, but you get what I mean, no? Anyway, point is, it's not OUTLANDISH to think "okay, so that world has base 10 too", which, as I said, is the important step, imo.
Now, our world may use 6 and their world VI, which would make for a good (and interesting-ish) situation in which the MC has to learn VI or, in this case, the girls have to learn 6. But as I said, is it imperative to the story?
It may be for Ascendance of a Bookworm since I assume there's a focus on books, which means letters AND numbers. But I doubt it's important here. Especially cause, as I said, it's probably a one-time joke so the girls can go "wait, he saw my weight, kyaaaa!!" -.-'
I see your point, but I feel you're going too deep with it.
It's really strange, and might indicate that some other isekai'd person in the past greatly influenced the world
If this manga was more serious then maybe, but seeing what it is... It's like watching ANY Hollywood movie and saying "the fact that there's always someone who leaves their car unlocked and with the key in the solar visor is a clear indicator that, in that universe, humans are in fact mentally handicapped and have evolved differently from us".
Uh... True. But no. Suspension of Disbelief, that's it. It's stupid, but we have to roll with it...