I've tried this with Sonoma betas as well as the released 14.0 and have seen none of this.There is something really funny going on here if you can't install the product by double-clicking the icon that appears when you open the .dmg file and after Sonoma mounts the disk image.

Is macOS running as US English, or is macOS configured to use some other language variant? Is this a clean macOS install, or an upgraded version from something older?