I'd also like to be in the beta. I've used aCar Pro for almost 7 years (and have close to 8 years of data, from converting from GasCubby back in the day).
I signed up using the old link, but I guess I didn't get in that way.
I will send you the opt in link for the beta, but will wait until the next beta update is released. I'd like some new testers for the updates. The next update should be ready in the next few days.
I talked with Armond, any translation updates will likely not happen for a while. Those will be included in when we re-skin the app in the 5.1 or 5.2 update.