Microsoft also plans to integrate Skype Translator preview into the desktop version of Skype that runs on Windows 7 "and above," according to a spokesperson responding to my question on this.
Microsoft won't yet say whether the company also is intending to fold Skype Translator preview into the "modern"/Windows Store version of Skype for Windows 8 and above, the spokesperson said. Currently, Microsoft requires Windows 8.1 users who want to test Skype Translator to download a separate Skype Translator preview app.
Microsoft officials said in January that the company is planning to bundle a Skype app with Windows 10, and that a preview would be available in "the next few months." Microsoft still has not provided any specifics beyond the original announcement about this new Skype app, and the aforementioned spokesperson said today the company still has no updates to share on this front.