Referencing to the http://people.canonical.com/~dpm/stats/ubuntu-11.10-translation-stats.html, Ubuntu 11.10 will available in 38 Languages (has been fully translated into 38 languages) and ready to shipped, Actually there was 220 language there but because of the limitations of the translator team that joined in Ubuntu Translator Team, at this time there's not possible for Ubuntu to provide ubuntu in all 220 Languages. So What languages are available in Ubuntu 11.10 Oneiric Ocelot, is one of them is your language ?, you can check following links :
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| Ubuntu 11.10 Available Languages |
A Language above can increase along with increasing of Ubuntu Translator Membership on its Languages (Country).