No, my system language is set to English. If it’s working like that for you, then there must be some misconfiguration on my part… But I never specified anything regarding languages.

I have custom formats in my profiles, and nowhere there did I see any option to prevent titles in multiple languages being searched. Could you please be more specific as to where exactly I can find that setting?

The quote must not be escaped when you start with a single quote. The rest doesn’t. This is valid and tested: <img alt='my "<img>"'>

You can’t parse every html opening tag with regex, because a html opening tag doesn’t have a set structure. How would you match, with regex, this opening tag? <mytag myattribute="<value of \"myattribute\">" >

It can’t be done, as an opening tag in html can contain anything in its attributes, even JavaScript (e.g. onclick handler).

100%. TDD is just not practicably applicable to a lot of scenarios and I wish evangelists were clearer on that detail.

Not sure why you focus on arrays for deep copying. Deep copying objects is a problem in many languages and brings some challenges with itself that make it almost always necessary to delegate it to a library.

Get this man some water.