Non-default locale variants not recognised by LO-voikko

[snomos]

I have the following zhfst files installed and recognised by voikkospell:

$ voikkospell -l
crk-x-standard: UofAlberta/GT/Divvun/UiT fst-based speller for Plains Cree.
crk-Cans-x-standard: UofAlberta/GT/Divvun/UiT speller for Syllabic Plains Cree.
hdn-x-standard: Giellatekno/Divvun/UiT fst-based speller for Northern Haida
$ voikkospell -L
spell:crk
spell:crk-Cans
spell:hdn

These are aksi recognised by LO-Voikko in Preferences > Language prefs > Voikko.

In the file pythonpath/VoikkoHandlePool.py the following entries are found for crk:

    Bcp47ToLoMapping("crk", "crk",  "CA"), \
    Bcp47ToLoMapping("crk-US",  "crk",  "US"), \

I would have expected the following locale tag combinations to be accepted and triggering the spelling checker:

• crk
• crk-Cans
• crk-CA
• crk-US
• crk-Cans-CA
• crk-Cans-US

Of these, only the following tags are recognised:

• crk-CA
• crk-Cans

That is, all combinations ending in US are unrecognised, and the -Cans- ones are only recognised without the country part. This seems a bit inconsistent, and will make it hard for end users to know what to type in order to trigger the spelling checker.

I don't know whether any of this is related to the fact that the crk locale code has been added erroneously to LO - as crk-CN instead of -CA (China vs Canada), but given that crk-CA is accepted, I would assume not.

[snomos]

According to https://bugs.documentfoundation.org/show_bug.cgi?id=73973 the correct BCP-47 codes have been added to LO since version 5.2.0, and the corresponding language entries have been available as «Cree, Plains, Latin» and «Cree, Plains, Syllabics». But when setting the text language to any of those, the speller is not triggered, even though both variants are found in the dictionary search path.

I have tried to add the following entries to VoikkoHandlePool.py, but it did not help:

	Bcp47ToLoMapping("crk-Cans",	"crk-Cans",	"CA"), \
	Bcp47ToLoMapping("crk-Cans-US",	"crk-Cans",	"US"), \
	Bcp47ToLoMapping("crk-Latn",	"crk-Latn",	"CA"), \
	Bcp47ToLoMapping("crk-Latn-US",	"crk-Latn",	"US"), \

[snomos]

Not a proper correspondence between language setting and actual speller language used: