If users are really interested in participating, they will find a way to do so.
After all, isn't that hard to collect a 200+ rep on any given SE site. Every person relates to more than one subject and can easily answer or place a couple of questions, thus achieving the required reputation to help with the commitment cap.
On the other hand I've recently started visiting Area 51 and found the Stackoverflow in Portuguese. As a Portuguese citizen and a programmer, I've committed to this proposal and really hope it gets to see the light of day.
For that end, I've started to spread this proposal, either publicizing it on my social pages, talking about it with friends and coworkers, etc. Soon enough some one that heard about this from me will actively work to help this proposal.
My recommendation: spread the word by all means at your disposal. Don't blame the system that has been around for years.
Tips and Tricks
Everybody got questions, so, place it on a SE site. A question receives upvotes that translates into reputation. Accepting the correct answer also gives reputation.
Placing answers on questions which a person can relate to, is also a great way of receive upvotes, that in turn, translate into reputation.
Motivate friends, coworkers, any given Portuguese programmer to bring their daily questions to SE sites, in a couple of weeks some will already have overcome the 200 rep :)