To collect all spell checking bugs and enhancements under one roof.
Great idea - I believe there is a wiki about meta bugs. This should be added to it if it does in fact exist. If not - maybe ask documentation team to create it :)
https://bugs.documentfoundation.org/buglist.cgi?bug_status=NEW&list_id=573297&query_format=advanced&resolution=---&short_desc=spell%20check&short_desc_type=allwordssubstr 67 bugs found.