Is that so! I watched the tutorial quite late one night so I probably misread that part. Thank you!This is true for V1, V2 is a bit more lenient. V1 requires you to transform your entire computer into a Japanese one; V2 you don't even need to change your display language for it to run. (It may be even more lenient than that, but that's the extent of what I've tested, aka I had to change my display language back to English for a bit and was pleasantly surprised when V2 worked just fine, haha)
And, re: fans wanting more male synths, I don't even necessarily think it's a bunch of weeb/fujoshi girls etc (although that's certainly a portion of them) but also partially an oversaturation and large variety of female choices, and a comparatively smaller amount of male voices that are both mature and pleasant to listen to. I'm fine with "shota" voices (ie, vocals like Len and Oliver are fine, just not my favorite by a large margin) but I'm glad Yuzuru has a more mature tone.