Hello Arturo, Esc is not like Ctrl or Alt or Shift: you don't press and hold it together with another key, you instead press and release it and then press the key you want to combine it with.
Please see the description in 'info nano ed spe', that is: section 4.2 of the nano manual. That your keyboard/terminal accepts the next character while you are still holding the Esc key is a nice feature, but is not universal. But... do the Ctrl+Left and Ctrl+Right key combinations not work for you inside nano to go to the previous/next word? If not, what terminal emulator are you using? Benno -- http://www.fastmail.com - The way an email service should be