Cool so for those of us who didn't read the web novel the first and only clue is that he doesn't understand the language of the first humanoids he's encountered in this world. Keep your disdainful remarks to yourself.
Other mangas for example when someone tries to mention some name or something unmentionable or like in this case some higher power is trying to interfere, the speech bubble is scratched over, replaced with noise, or a hard to read fonts. It doesn't take a genius to get the idea more so when you have argued time and time again why if he can create all that kind of magic consciously or unconsciously, but he is unable to do so even though several times he's wished to understand the creatures around him after all this time.
Should I point another clue on page 6: "If only we could communicate... When these kids are talking, I can't recognize what they say as a language AT ALL FOR SOME REASON..."
But it seems you either read the spoiler I left and you'll just ignore it and come back next chapter and keep arguing the same thing again.