Hoi, At the moment we are reaching out to all the language communities that have a Wikipedia. For some languages we have had reasons to reach out earlier; they are the language communites of Indian languages and the language communities where we identified issues with our MediaWiki plural definitions.
As a result of the outreach about plural support, we are now looking into the plural rules for Scots Gaelic. As you can read in the translatewiki thread, these rules are used in several applications and it is beneficial when the applicable standard has correct information about this so that it is easy to implement. It is really heartening to learn that bugs have been posted at the CLDR to include this language.
As support for things like plural are often implemented when a large body of code has already been written, it follows that the existing code needs to be refactored to include support for plural, grammar, gender in messages. In many threads in Support at translatewiki.net, you will find people indicating single messages. These are often readily picked up by the staff at translatewiki.net. However, there are big projects that linger on to mind comes logging. The log files are often about people, they do have a gender and consequently many of the messages need change and support gender. The good news is that Niklas build the framework that allows for gender support in log messages. The bad news is that it is a big job that needs doing for many logs.
If you are interested in working on the MediaWiki code and improve its language support, we are quite happy to point you to what needs doing and we do lend a hand when need be. Thanks, Gerard