Just an observation.. it happens only level2 is a folder. If I have a page at level 2, then I can created under that hierarchy from both the options mentioned above..

From what I think, language copy is just a way to overcome one by one manual creation of different language sites and there is no relationship maintained in it. So once created, there are like independent content pages/hierarchy. So deleting it is same as deleting a normal page. If you dont have per...

This is regular expression. ? makes the pattern in () optional. To explain it further, if you use "?",  all paths under /content are valid(including /content as well) but if you dont use "?" then "/content" is not allowed./content [Invalid when "?" is NOT there]/content/a [Valid in both]/content/a/b...

When you do <sly  data-sly-resource="${resource @ appendPath='/jcr:content/root/news'}">looks for all the resources/nodes under your current resource... Depending on where your resource to be rendered is located, you should be using :<sly  data-sly-resource="${resource.path @ appendPath='/jcr:conten...

Mind sharing a sample package?

Are you getting following on opening dialog(check browser console) :"Uncaught RangeError: Maximum call stack size exceeded"

If you use, ":", then it needs to be registered as namespace in AEM

Strange enough I dont see an error when clicking on Edit... I can edit but while saving it throws some error in the backend, which seems unrelated to this.

Any sample content package to replicate this behavior?

I think when you do it the first time, language copy is created with whatever translated content you receive but while updating, the translated content goes under "launches" and you have to promote launch to make it available on your original page..