default)
 * :collate
 * :ctype
 * :monetary
 * :numeric
 * :time

Returns the new locale if set successfully, otherwise nil. Note that this will affect other functions such as `os/strftime` and even `printf`.</pre><a href="https://janetdocs.org/os/setlocale">Community Examples</a></div><hr><div class="binding"><span id="os/shell" class="binding-sym">os/shell</span> <span class="binding-type">cfunction</span> <span class="binding-type"><a href="https://github.com/janet-lang/janet/blob/0d9e999/src/core/os.c#L