I've had the same problem with wattOS-R10-32.iso (downloaded today) installing on an 12 year old Thinkpad R50e. Language selected was Brazilian Portuguese.

First I wrote the image file to a usb stick with SUSE Studio Imagewriter.

On first installation (not connected to a network) the system reported a problem near to the end of the installation process (after grub installation).
The system did boot but software installation was broken, no /etc/apt directory.

The second time, I connected the machine to a network and asked for packages to be updated during installation. The same problem happened but this time with a bit more info: the installer reports a problem with ubiquity 2.21.63. UbiquityDebug says Gtk-message Failed to load module "overlay-scrollbar".

The system boots, but language preferences were not applied. Not sure if one is related to the other.

After reading this post I used dd to write the image to the usb stick, but I had the same problem as on the second attempt.

If some of you could tell me where the installation logs are I would be happy to post them here.

best wishes