jheem’s Greek, Russian and Chinese look OK to me, as does Faldy’s Korean (I’m guessing) but the Sanskrit and Tamil are just question marks. Firefox 1.5.0.9 for Mac.
The Georgian is all question marks in Firefox for Mac.
My superscripts above were done with Unicode rather than the (unavailable) “sup” HTML command. Unforunately, digits 1-3 are implemented differently than the others, so the 8 doesn’t line up with the 2 and 3 in the uranium-238 symbol.
Do you also see only squares in the Georgian Wikipedia article from which I copied the Georgian phrase (which, by the way, reads kartuli ena ‘Georgian language’)?