The entry for Thai on the locale/language picker screen at the start of newUI is all unicode boxes (see attached screenshot). Looks like we're missing the appropriate font from the installer environment.
Created attachment 636952 [details] screenshot (from smoke14, I checked tc6 is the same)
I don't suppose anyone would know what the font package is?
/etc/fonts/conf.d/65-nonlatin.conf lists the following for Thai: serif <family>Kinnari</family> <!-- thai --> <family>Norasi</family> <!-- thai --> sans <family>Waree</family> <!-- thai --> <family>Loma</family> <!-- thai --> <family>Garuda</family> <!-- thai --> <family>Umpush</family> <!-- thai --> monospace <family>TlwgTypo</family> <!-- thai --> <family>TlwgTypist</family> <!-- thai --> <family>TlwgTypewriter</family> <!-- thai --> <family>TlwgMono</family> <!-- thai --> I think the preference is top-to-bottom, so that would mean Waree is the preferred Thai sans font. So, I guess what you want is thai-scalable-waree-fonts . There are samples at http://linux.thai.net/~thep/font-samples/thaifonts-scalable-img.html if you want to use your extensive Thai knowledge to decide which one looks nicest ;)
http://slice-of-thai.com/fonts/ seems to be aware of all of them and prefer Garuda, but eh.
The problem still exists in Fedora-18-Beta-TC8-x86_64-netinst.iso
*** Bug 882767 has been marked as a duplicate of this bug. ***
lorax-18.23-1.fc18 has been submitted as an update for Fedora 18. https://admin.fedoraproject.org/updates/lorax-18.23-1.fc18
Package lorax-18.23-1.fc18: * should fix your issue, * was pushed to the Fedora 18 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing lorax-18.23-1.fc18' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-19867/lorax-18.23-1.fc18 then log in and leave karma (feedback).
Proposing NTH because, ridiculously, this didn't get in before Final freeze. Affects a supported language, you can't install in Thai with this problem.
lorax-18.24-1.fc18 has been submitted as an update for Fedora 18. https://admin.fedoraproject.org/updates/lorax-18.24-1.fc18
Discussed at 2012-12-17 NTH review meeting: http://meetbot.fedoraproject.org/fedora-bugzappers/2012-12-17/f18final-blocker-review-5.2012-12-17-16.40.log.txt . Accepted as NTH - always bad to break a language.
seen also in SoaS TC3 anaconda 18.37.2 some languages are a series of squares in anaconda language selection screen
That's different, as lives are composed differently. As SoaS is built on top of the -minimal kickstart, not the -live-base kickstart, it is missing quite a lot of stuff that other spins have, which may include various language support packages.
Seems fixed in TC3, I see actual letters for Thai. No idea if the chosen font is a good one, but it has to beat boxes. :)
lorax-18.24-1.fc18 has been pushed to the Fedora 18 stable repository. If problems still persist, please make note of it in this bug report.