Just forwarding on a message from Waylon on the blog:
We designed ODK to work all over the world and supporting multiple
languages inside each tool has always been an important goal. With the
community's help, we've made great progress. For example, ODK Collect
has been localized into seventeen languages!
We think the current localization process is a little cumbersome, so
today, in partnership with Nafundi (http://nafundi.com), we are
launching a new easy-to-use process to improve on and add to these
seventeen translations.
If you speak English and another language (especially Swahili, Hindi,
Portuguese, Hausa, or Indonesian) our users need your help. Please go
to https://transifex.com/projects/p/odk-collect, and sign up to
improve on, or add a translation.