I will explain how to add a multilingual field with codebehind because this is quite tricky…
Let’s say you want to add a field ‘Client’ when a certain feature is activated. A reason for this to be in codebehind could be that this feature already existed and you’re writing an update. So you want the field to be added to exisitng lists aswell. And ofcourse for Dutch users it should read ‘Klant’.
So here is the code to show you how to add a multilingual field (sorry, for the layout wordpress is not so code friendly (or do enlighten me 😉 )):