Can the name of a label be a number?

This is a question I’ve been wishing to ask for some time. For example, is it legal to write:

*label 234

I heard that the name of the label should contain only letters but reading other discussions, I get the impressions that it is an option now.

Thanks!

You can i have numbers labels like 123 but is not a new option.

You can mix numbers and letters as well.

Thank you for your answers. This will make conversions into ChoiceScript easier :),