For a personal blog, the number of languages is likely to be no more than two or three at most (putting aside any comments or other world-writable parts of the

For a personal blog, the number of languages is likely to be no more than two or three at most (putting aside any comments or other world-writable parts of the page). So it seems that one could easily trim the font files to only the needed characters, or even load them only for specific articles that need them. The bigger issue would be a general forum where people can and do write in any known language. And not only would the site have to support the character sets, the admins would likely have no way of even knowing if the various characters were being displayed correctly let alone if the font had a good readability/seriousness in that script.