Translation Check by Chrouya
Script: Ripped from below raw.
Workraw: [HorribleSubs] Jinrui wa Suitai Shimashita - 09 [480p].mkv 

=======Book Sign=======
妖精さんメモ
「蝟集性ストレス」

さすがの妖精さんでも、人口が極たんに増えすぎると
「ぼくって、いらないこ、なんじゃ？」
「おとなになんて、なりたくない」
「がっこう、いきたくない」
などと思いこみ、元気を失ってしまうことがあります。
こういった場合でも、妖精さんはてき切な人口に
なるよう自然と散っていく性質を持っていますが、
はなれがたい理由があるときにはがまんしてしまい、
ストレスをためてしまうのです。
妖精さんを餌づけするときには注意しましょう。

Fairy Notes
"Overstressing" {lit. Piled up stress}

When the population grows too excessively, some fairies may think like:
"Am I not needed anymore?"
"I don't want to become an adult." 
"I don't want to go to school."
As a result, fairies will lose their spirits. {happiness}
Even in such cases, they have the ability to 
decline naturally to balance the population once again,
but as they hold on when they find it difficult to part ways,
it'll cause stress to pile up as result.
So please be warned when feeding the fairies.
=========================

11
The Fairies' Survival Skills
{hyouryuu no seikatsu = Living in the drift} {<-- as they're drifting on a raft later on}
{no change needed, since it's mostly about survival, and they keep using the term "adrift", but that would make the script boring}

67~68
{these fairies are talking BS here ;w; so leave it as a pun}

83
Cast away?
{note that this sentence is the same as the title}
{I guess there's no change needed}

221 (SIGN)
はつめいするもの
Items to invent:
じゅうような
Starting with 
ものからつくる
the necessities.
口　べっと
Bed
口　まっさーじいす
Massage Chair
口　かしつき
Humidifier
口　わごむ
Rubber Band
口　ぴたごらそうち
Rube Goldberg Machine
口　しゅうきょう
Religion
口　せろてーぷ
Sticky Tape {Adhesive Tape}

229
(But of course it was an illusion.)
{just so you know, she pronounces the parentheses}

236
I'm approximately thirty hours old.
I'm approximately three hours old.
{even worse, lol}

358
Environmentally desroyed areas are subject to runoff.
Environmentally destroyed areas are subject to runoff.
{everyone would see this typo}

378 (sign)
高圧
High Voltage