No, sorry. Changing a name breaks all translations and must be worthwhile. “Flip: Horizontal” and “Flip: Vertical” are quite likely better for English rather than “Mirror,” but I do not have a big problem with the current names. French has its own translation. Also, soon there will be extra keywords that will go into the search, and then things with an unexpected name can be found easier. For example, both will show when search for “flip” or “mirror”. Or, Mirror will show when search for “horizontal”.