We work with many languages using Crowdin[1]
Sometimes translators forget to fill in all the necessary plural forms of a translation (zero, one, other) and in those cases we were seing the exception InvalidPluralizationData being raised
There are a number of approches to fix this... from being more strict when approving translations, to automatically extrapolating what those plural forms should be
For now, we've gone for a simple approach to display the actual count(0,1,2,3,4, etc) instead of the whole translation
So, if the plural form of "1 comment" is missing, just a "1" will be displayed and no exceptions raised
Note: The first two specs, test what is really Rails' functionalities. However as we are monkey patching the pluralize method, I thought it was appropriate to doble check it
[1]https://crowdin.com/project/consul