Language packs for version 1.9 will also work on version 1.10.

However, version 1.10 introduces some new strings that would need specific translation.

Thus, complete 1.10 language packs will improve user experience.

Now would be a good time for all translators to update translations for version 1.10 and send them to me.

If you've never done a translation before but would like to contribute, you can find startup instructions here. There is a cool tool to help you translate efficiently.