Few days ago I have faced with the situation when some of my templates had had language versions that differs from en.
Firstly I opened Template Manager and navigated to desired template. Then I clicked on Versions tab and was very surprised. There was no button to remove version! There is possibility to save, to switch and to reset, on this tab. Fortunately, Sitecore is a very powerful tool with a lots of different helpful utility pages. One of them saved my life.
Andrey Vinda 