Hi,
I did not try cesar 1, I can check it. For settlers 1 set manual correction to 340,226 and set type to settlr1. Just quickly tested, seems it works. Btw, there should be amateur android port of settlers 1.
Place special widget on the screen and reset mouse if it will be after some time inacurate. If I remember well, in main menu did not work this fix, switch to relative mouse in this case, I recommend mouse navigation widget 🙂