We have some documentation here on how to contribute translations. Our Transifex list can be found here.
Another key place to contribute to translations would be through our Concept Dictionary. The community’s main concept dictionary is maintained by CIEL. You can reach out to @akanter if you have knowledge of medical terminology in a non-English language, since I know there is a real need there.
Other areas to contribute include the Documentation Team (who have a meeting tomorrow at 1 PM UTC). There’s also a website revitalization committee, if your interested in helping improve our landing site.
@jennifer, our Director of Community may be able to point you to some additional ways to contribute.
In any case, welcome to the OpenMRS community! We look forward to your contributions!