Wiktionary will handle interlanguage links in a new way. The Cognate extension will automatically link pages with the same title between Wiktionaries. For this to work all old interlanguage links have to be removed. You can read more about this. 
The new version of MediaWiki will be on test wikis and MediaWiki.org from 25 April. It will be on non-Wikipedia wikis and some Wikipedias from 26 April. It will be on all wikis from 27 April (calendar).
You can join the next meeting with the VisualEditor team. During the meeting, you can tell developers which bugs you think are the most important. The meeting will be on 25 April at 19:00 (UTC). See how to join.