Take a look at the speech recognition config file in the app install folder. There are customisation instructions at the top. It should be simple enough to change tightens to X so it's just tightens X, or have both options
[edit]
I was about to add this, but it's already there:
Code:
RALLY_TIGHTENS_TO_1 = tightens to one:tightens one:tightens acute:tightens to acute
RALLY_TIGHTENS_TO_2 = tightens to two:tightens two:tightens kay:tightens to kay
RALLY_TIGHTENS_TO_3 = tightens to three:tightens three:tightens slow:tightens to slow
RALLY_TIGHTENS_TO_4 = tightens to four:tightens four:tightens medium:tightens to medium
RALLY_TIGHTENS_TO_5 = tightens to five:tightens five:tightens fast:tightens to fast
RALLY_TIGHTENS_TO_HAIRPIN = tightens to hairpin:tightens hairpin