In creation city after receiving the spark power, there is a gate which you can open and close by typing. You can do this for as long as you want and the word remains the same, also no time limit so you can go as slow as you need. You can get the achievement by doing this. The achievement will only unlock when you leave typing mode though.
Another little tip is that you if you exit to main menu and come back the word will change, so you can cycle for an easier word to type if you want. Mine was "Positron", didn't take very long.