I have recently received an email from a very close and reliable source that works with the translation team. He properly revealed the starter evo names weeks before they were announced, so I trust his judgement here.

I'm going to post screenshots of the email instead of copying and pasting the text, because Nintendo currently has a small team that scours the internet, looking for leaks to shut down and send a C&D to, and since they use searchable text, it's all in a total of seven screenshots.