Translation Check by Chrouya
Script: Ripped from below raw.
Workraw: [HorribleSubs] Jinrui wa Suitai Shimashita - 08 [1080p].mkv 

=======Book Sign=======
妖精さんメモ
「妖精さんの道具」
妖精さんが作る道具は、どれも奇妙な効果を秘めています。
どんな効果があるかは道具によって異なります。
たまにしゃれにならないこともあるので、もしゲットしたらよくよく注意して使いましょう。
形や大きさは人間サイズで作られていることが多いので、
自分たちで使うためではなく、人間への贈り物でもあるとも言われています。
なぜか妖精さんの道具は、どんなに厳重に管理していても
紛失してしまうことがあるそうです。
すごくふしぎ！！

Fairy Notes
"Items of the Fairies"
Items made by the fairies all have bizarre hidden effects inside them.
The effects that may occur vary for each item.
They could be dangerous sometimes, so use them in caution if you ever get your hands on them.
Although the form and size of these items are frequently human-sized,
they might not meant to be used by us, but they might rather be gifts for the humans.
For some reason, the items of the fairies seem to be kind of bugged,
albeit being managed very carefully.
It is a mystery!! {http://www.youtube.com/watch?v=fq3abPnEEGE}
=========================

74
his habit of wandering off \Nmust have kicked in.
his habit of wandering off \Nmust have kicked in, so I lost sight of him.
{literally, missing the TL of miushinatte shimatta no}

81 82
I got yelled at, I came, I saw,
I got yelled at, I came, I tripped, 
I slipped, I got yelled at again.
I vanished, I got yelled at again.
{this is what she says. suttobu = "to rush off/away, to vanish (in a hurry)"}
{You /could/ leave in the "I came, I saw, I [x]" quote in it, but it's pretty killed by the line split}

88
his habit of wandering off \Nmust have kicked in.
his habit of wandering off \Nmust have kicked in, so I lost sight of him.
{see line 74}

108
It's as if he has no body to remember.
It's as if he's transparent.
{a mere alternative, but you can make of it what you want}

154 155
The assistant was alone \Nin his isolated world,
If the assistant was all alone in his isolated world,
so how did he define himself?
how would he be able to define himself?
{It's a hypothetical question}

158
There was no one around to talk to.
There would be no one around to talk to.
{it all stays hypothetical}

161
He was like a blank canvas.
{literally "Completely colorless and transparent."}

165~167
{i'd use the term "yearn for" in this situation}

237
{http://en.wikipedia.org/wiki/Doc_Holliday}

242
{http://en.wikipedia.org/wiki/Western_%28genre%29}

281
{http://en.wikipedia.org/wiki/Gunfight_at_the_O.K._Corral}

====337====
You can see a sign here that says:
I wanna eat sweets
===========

343
{http://en.wikipedia.org/wiki/Software_bug}
{perhaps, you want to change the terminology here}

442
{yes, he just made the pun of Time Paradox and Time Paradogs}
{Perhaps somehow use plural here (there are more of these dogs, hence the paradox as well)}