Hi Toan,
Arial absolutely not working in Rv for Vnm. We thought this is going to be piece of cake, for myself is a Vnm, and I use Vnm very often on the phone, thanks to Android.
Turns out it costs us more time than the design itself. So our first set out we used all text in English. We have the associate guy in VN translated everything in Words, email back and copy and paste. This is when we found Arial font was not working, producing weird symbols inside Rv.
We download the Unikey thingy earlier, but it has bugs, some accents are not working, specially the most used ones, "dau sac" and "dau huyen". We thought the digital signature is the problem. Turns out even so, the instructions on their website is not on-par and up to date either. And to update newer version, it won't override the previous one (to be safe, we earlier downloaded the stable version).
So as the PM, I said "what the "f", we went back to English, and the hell with the translations. We don't care if the project gets moving at this point...End of story.
Hope someone here has ACTUAL EXPERIENCE on the matter to help. The ones in VN still work in Cad, so no help...
(Not to mention we don't know the end result of printing to pdf yet, maybe that s also a big problem)