The apostrophe case is common to all test fixtures except the Java version as far as I can tell. I would really like to replace the Java version of this kata, especially because of the empty-string null case and also because of the lack of test cases that translation has in comparison to the other translations (which appear to replicate my original Javascript test cases for the most part). I'm a bit of a newbie to kata translations, but they don't seem to allow languages that have already been translated. I've provided feedback, but may end up creating new test cases, etc, and then just directly contacting the admins with them.

Among my testcases there was a call against string with single quote, like "foos aren't bars", while expected result was "Foos Aren't Bars". But "aren't".title() equals "Aren'T", so solution using it doesn't work, and yet it's at the top. So, different people given different testcases, some get "harder" cases, which causes them to write more complex code than other people.