"We’re happy to announce that we just released build 6 of ApSIC Xbench 3.0 spell-checking dictionaries. With this build, we are also introducing a new concept: Fusion Spell-checking.
Fusion Spell-checking is indeed a very simple, yet powerful concept: Hunspell dictionaries are very, very fast, but sometimes they wrongly flag a few words as misspellings. For some languages, they can even issue a large number of false positives if that particular dictionary is of lower quality.
And here is where Microsoft Word enters the stage: Whenever Hunspell thinks that a word is a misspelling, it will check Microsoft Word if it also agrees. The offending word will appear on Xbench spell-checking reports only if they both agree.
This collaborative work of Hunspell and Microsoft Word effective means that there are fewer false positives in the spell-checking ..."