BUG: np.dtype("Float16") raising inconsistently depending on locale #20512
Description
In pandas-dev/pandas#44715 I depend on np.dtype("Float16") to raise TypeError: data type 'Float16' not understood, and it does on most CI builds.
Two builds on which it does not raise are 1) a build with locale.getlocale()[0] != "en_US" and 2) a py310 windows build with npdev.