The PHB describes a short rest as:
A short rest is a period of downtime, at least 1 hour long, during which a character does nothing more strenuous than eating, drinking, reading, and tending to wounds.
Here's the scenario.
The party holes up and declares the intention to take a short rest. The wizard casts comprehend languages as a ritual, and then spends the hour of the spell reading pages from a written text written in a lost language, one page a minute. While the literal words of the text are easy to decipher, due to the spell, it is challenging to make sense of the text as a whole, and the wizard needs to go back and forth to make sense of it, sometimes having to reread pages in light of the information on other pages.
Is this activity more strenuous than "eating, drinking, reading, and tending to wounds"? I am inclined to rule that it is, but I want to know if there are aspects that I am missing.
I am looking at the hour of the spell's effect as occurring during the short rest, excluding the time required to cast the spell, so the effort required to actually cast the spell is out-of-scope for this question. I'm just asking if the effort described to actually make use of the spell's effect is more than allowable in a short rest.
I'm interested in both RAW and in people's actual experiences with similar situations.