Minor orthographic typo

- The number *sixteen* in spanish should be written with an acute accent, e.g. *dieciséis*
- The number *twenty-two* in spanish should be written with an acute accent, e.g. *veintidós*
- The number *twenty-three* in spanish should be written with an acute accent, e.g. *veintitrés*
- The number *twenty-six* in spanish should be written with an acute accent, e.g. *veintiséis*
- The number *one thousand* in spanish should be written *mil*, not *un mil*