I'm afraid you can't. Even if you buy WaveNetVocalizer Global without the Standard Version, you will not be able to login.
Here is why:
1. WaveNetVocalizer Standard is the main product which is either an Yearly Subscription or Monthly Subscription.
2. WaveNetVocalizer Global is an Upgrade or Up-sell which enables Translation Feature in your WaveNetVocalizer account.
3. Since WaveNetVocalizer Global is not independent, you will need to subscribe for the main product WaveNetVocalizer yearly or monthly subscription first. Else you can't login with only WaveNetVocalizer Global in your account.