How improved AI service latency can be?

With Shining Blade/Ark translation cancelled I’ve decided to give this swat autotranslation feature a go to try and play those, and Suikoden PSP too.

I followed the guide and it works well enough, but a bit slow. It takes several second between a button press and actual text poping up. I wish it was more like google camera…

Fastest method, as manual says, is to use google api key. How exactly is it fast? Can it reduce latency to one second? Too maybe? How many time it takes between button press and actual text overlayed?

I know I could test it myself, but I’m reluctant to give google my credit card to get this key, unless I’m absolutely forced too.

Thanks for replies, RA fellows.