Without boost::locale, there seems no particular reason to modify the global locale, we can just translate strings ourselves. Other locale facets like numeric and time are also left unchanged from the default, which is the "C" locale. This appears to match previous Blender behavior with boost::locale. That protects against bugs where formatting floats for I/O unexpectedly depends on the system language. Pull Request: https://projects.blender.org/blender/blender/pulls/133347