I suppose it's possible, but having to press eg Fn+Ctrl+A to get "á" doesn't strike me as terribly usable.
Not without overloading the osso-xterm shortcut toolbar with the missing essentials (if they can even fit there) - off the top of my head it needs ESC, Tab, %, ^, ~, | , < , > , [ , ] (bold ones also missing from the N810 keyboard), and possibly left & right arrow keys for non-english variants.