Every HUGE manual I've ever seen is bilingual so it's probably just all the made up languages you yuropeens love to have.
Anyway, shumps are more rehashed than cover shooters but this one's gimmick is entwined really deep in its gameplay, and yet is more intuitive than the average stuff Cave seems to muster, so I'll give a quick rundown just so you can differentiate it from generic bullet hell shump 3,421.
First, difficulty-wise, it's not hugely hard. I look at it and a 1cc might be feasible for me if I could avoid all those accidental deaths. But I can't, so it isn't. Still, this game is not viciously hard, but there's a lot of excitement still for anyone who likes dodging neon dots. Pacing wise, you just hit the ground running. The first two stages aren't gimmies at all unlike certain other shumps.
Main meat here, there are three modes. Original Arcade, Remake of Original Arcade with better graphics and the extra stage, and then the main actually good mode. They have weird Japanesey names like Slash, Origin, and Climax and I can't remember which one is which but you can figure it out. In the actually good mode, the basic Cave standard of "Fill meter, unleash full meter, turn all bullets into gold, repeat forever." is expanded to about three different meters. Shoot your heavy shot to get enemies to give you transform energy, which lets you transform for a brief period of time. While transformed, you can take a bullet and get knocked back into normal state without dying. Shoot rapidly to get point items that build up your orbs. If you transform, those orbs will be deployed. Shoot heavy in your transformed state and those orbs will fire, cancelling bullets and becoming swords if they hit an enemy. Keep shooting heavy to build up swords without worrying about orbs, but you are limited by your transformation time. Swords hover around you and can be fired by transforming back to normal. Swords do massive damage, give massive points, and cancel bullets. Firing a full array of swords is truly UNLEASH THE FURY power.
So, in short, shoot fast for orbs. Shoot hard for energy. Transform with energy and orbs. Fire orbs while transformed to get swords. Transform back to fire swords for jackpot. Start again.
It's sounds like a mouthful but it is quite intuitive in the actual game, except for all the times you get hit or run out of energy or misfire orbs and swords or accidentally bomb or whatever usually happens.
The original arcade mode is stupid, with an energy only thing. Catch energy pickups with your familiar and let boolets pass over them to grow them. Transform and you become INVINCIBLE while shooting fast, reflecting all boolets only to have them converge elsewhere. Shoot hard (Dropping your invincibility) and kill an enemy to cancel all the boolets around him, so you are herding the boolets to where you can cancel them safely. It's as hackneyed as it sounds.
It was a smooth ride.