[Doitsu]

Originally Posted by KevinH

Are these .dic_delta files pure text lists of words one per line like our UserDictionaries or do they have a specific format?.

They have exactly the same format as the current user dictionaries.

Originally Posted by KevinH

What if the existing UserDictionary file name does not include the language and region? For example, how would your naming convention work with the "default" user dictionary Sigil sets normally?

That part of the code would need to be changed so that only language-specific user dictionaries with fixed names can be created.
IMHO, this would also have the advantage that Sigil would automatically select the correct user dictionary for each language.

Originally Posted by KevinH

I guess we could assume that the default dictionary to always be the same language and locale as the Primary Dictionary setting, whatever the user sets for that.

IMHO, that's a safe assumption.

Originally Posted by KevinH

The same question holds for all people's existing UserDictionaries. I guess we could again assume all existing UserDictionaries are in the Primary Dictionary language and region and copy and rename them in the next release to the form (replacing the en_US with whatever the primary dictionary is):

IMHO, that's also a safe assumption.

Originally Posted by KevinH

I wonder how many users of Sigil make extensive use of its UserDictionaries feature? I do not.

I use one user dictionary per language, but there might be Sigil users out there who're simultaneously working on multiple books and use multiple user dictionaries for a single language.

Hopefully, we'll hear from them. Otherwise they'll have to live with the fact that they can only create one user dictionary per language.

Besides, if they really need more user dictionaries, they could simply create copies of the existing dictionaries. For example, users who created three en_us user dictionaries for would need to create two copies of the en_us dictionary:

en_US1.aff
en_US1.dic
en_US1.dic_delta

en_US2.aff
en_US2.dic
en_US2.dic_delta

As for the existing user dictionaries, we could provide a simple plugin that automatically renames them, and, if necessary, creates copies of the existing Hunspell dictionaries, if there are multiple user dictionaries for a single language.