Hi Martin,
Have you seen this question?
https://forum.mendix.com/link/questions/89253
Ronald's answer suggests to create a microflow for every page that creates a string variable with the page name and passes it to a sub microflow that will run the logic for the help text.
Another way to do this is with javascript. You could create a non-persistent object with an attribute for page name, and in your script, create the object, set the value based on the page name and then execute a microflow with this object as a parameter.
you can use below code within javascript snippet and use it with nanoflow to get current page name:
var x = mx.ui.getContentForm().path;
var y = x.split('/');
var z = y[1].split('.');
var pageName = z[0];
return pageName;
Note:
you can test this code directly from browser console.
As far as I know: Not at all.
This information is not passed to the server. What is your use case?