Problems with \Ref and babel (The Latex Companion 3rd edition p.78) about babel

[davidcarlisle]

Link for ease of reference https://tex.stackexchange.com/a/715560/1090

[jbezos]

As David explained, babel modifies some internal macros to deal with shorthands. The option safe=none tells babel to keep the original definitions and not to modify them — the name comes from the fact formerly shorthands were not ‘safe’ and raised an error (admittedly, currently this can be misleading). Some time ago, \ref was redefined in the LaTeX kernel so that shorthands are safe even with safe=none. As Ulrike pointed out in Stackexchange, this behavior is documented (just search the babel manual for ’varioref’), and in my tests shorthands work in \Ref even with safe=none, too.

The real fix is most likely to make safe=none the default, but I’ve not taken this step yet because \nocite, \bibcite and the like are still unsafe.