9.45.3 Can you answer these questions?

9.45.3.1 auto expansion only possible with scalable fonts caused by siunitx

https://tex.stackexchange.com/landing/r/digest?cta=question&id=690532

english (german version below): I have this LaTex code from a template, I have strongly minimized the preamble, because in the original preamble about 100 different packages and functions are included ... 
[miktex] [siunitx]
 

asked by Albertus https://tex.stackexchange.com/landing/r/digest?cta=user&id=300322 Score of 1

answered by Albertus https://tex.stackexchange.com/landing/r/digest?cta=user&id=300322 Score of 0

9.45.3.2 Change language in one page to arabic when using MasterDoctoralThesis

https://tex.stackexchange.com/landing/r/digest?cta=question&id=690615

In the masters-doctoral-thesis template the language is chosen when the document class is called in the main and is applied to the whole thesis. However, I would like to mention in one specific page ... 
[thesis] [arabic]
 

asked by Wallflower https://tex.stackexchange.com/landing/r/digest?cta=user&id=225587 Score of 1

answered by Manan Intindinichu https://tex.stackexchange.com/landing/r/digest?cta=user&id=300379 Score of 0

9.45.3.3 Full-width sections appearing off margin in tufte-style book

https://tex.stackexchange.com/landing/r/digest?cta=question&id=690674

I am using \documentclass[justified, twoside, symmetric]{tufte-book}. 
But my \begin{fullwidth} text is moving off-margins particular pages (please see the image below).  I have tried adjusting the ... 
[latex3] [fullwidth] [tufte-book]
 

asked by Richard Summers https://tex.stackexchange.com/landing/r/digest?cta=user&id=300431 Score of 1