It would be a "nice to have" to be able to install CiviCRM in another language, e.g. for the installer itself to be translatable.
The topic came up in discussions during CiviCon/sprints, since a lot of people, while they have some understanding of English, will feel more comfortable in their language. It also makes CiviCRM look more professional and shows that we take localization seriously.
(Yes, a lot of the documentation is still in English, but as the community grows, we can localize that too. Ex: Drupal can be installed in another language, has localized docs, special sub-sites for various languages, etc)
The topic also came up some time ago in