Pages to do with ProgrammingLanguages (contrast CategoryNaturalLanguage).
The convention is to append 'Language' for the WikiName and to expand single letters according to the WikiAlphabet.
However, sometimes that doesn't work and you have to improvise. Some less obvious or WikiUnFriendlyNames are listed here (seems to me that all are listed here; should we clean this up?) (indeed: surely the only ones that need to be listed here are those that are neither of the form OnewordnameLanguage nor MultiWordName?):