Jürgen Spitzmüller

Note that the polyglossia conflict has been (re-)fixed but there are still problems with `unicode-math`'s prime handling with polyglossia Latin as well as with babel languages with active prime (such...

@wehro try if adding the babel alias `\setlanguagealias[variant=ecclesiastic]{latin}{latin.ecclesiastic}` in `gloss-latin.ldf` helps. If so, we can fix this on the polyglossia side.

Sorry, it should be `\setlanguagealias*[variant=ecclesiastic]{latin}{latin.ecclesiastic}` (with a star)

Ehrm, actually I do not get the above warning with biblatex 3.14 and polyglossia master (using the MWE above)

> You need to run lualatex two times and biber in between to see the warning. That's what I did. Still no warning (not the one in question, that is)

The warning is triggered by biblatex's `\blx@ifhyphenationundef` test which triggers polyglossia's `\xpg@ifdefined`. Since this tests for _hyphenation pattern names_, neither polyglossia names nor babel names/aliases are correct in this case,...

Another option, on the polyglossia side, would probably to let `gloss-latin.ldf` define `\adddialect\[email protected]\l@latin` if the variant is loaded next to doing the alias addition mentioned above.

> next to doing the alias addition mentioned above. the latter is probably not needed

> `\adddialect\[email protected]\l@latin` This does not work due to the dot. So either do in biblatex as suggested above (https://github.com/plk/biblatex/issues/949#issuecomment-570062826) or change the babelname in gloss-latin.ldf to `latineccelesiastic` and add `\adddialect\l@latinecclesiastic\l@latin`

> Any solution that does not respect the `hyphenation` option does not help. Then it's up to you to set up proper language aliases (via `\adddialect`) in these cases. E.g.,...