Now that the i18n code is merged, we will need to register the CopyPatrol tool (http://tools.wmflabs.org/copypatrol/) with translatewiki.net so that we can start getting translations. We should also set it up to automatically push the translations to the GitHub repo.
See https://gerrit.wikimedia.org/r/#/c/275131/ for how to do this. (But see Nikerabbit's comment on the last patch.)
Also, see if there is any way that we can have translatewiki.net only translate certain languages (rather than all of them). Might need to ask @Nikerabbit about this.