What is morphunassetsupdaterd?

I haven't noticed this process earlier.

Process:         morphunassetsupdaterd [2684]
Path:            /usr/libexec/morphunassetsupdaterd
Load Address:    0x105960000
Identifier:      morphunassetsupdaterd
Version:         100.4
Code Type:       X86-64
Platform:        macOS
Parent Process:  launchd [1]
OS Version:      macOS 11.6.1 (20G224)

Is it legit process or malware?

Just by inspecting the plaintext strings in the binary, it's easy to tell that morphunassetsupdaterd is a daemon that is used by Siri to download updates to language assets, or morphuns (according to the internal terminology used at least in this code)

Here's some selected output from strings /usr/libexec/morphunassetsupdaterd:

updateAssetsForLanguages:
removeAssetsForLanguages:
logLanguageList:languages:
singleShotUpdateForLanguages:
singleShotRemoveForLanguages:
getAllLanguagePaths
getCurrentLanguages
updateCatalogue:
updateAssetForLanguage:error:
purgeAssetsForLanguage:error:
startCatalogDownload:options:then:
isUpdateNeededForLanguage:neededAsset:uneededAssets:error:
spaceCheck:
startDownload:then:
purgeSync
purgeResultToString:
queryInstalledAssetIds
isMorphunOnDisk
isMorphunInstalled
morphunCompareByVersion:
morphunMasteredVersion
purgeAllAssets
morphunContentVersion
morphunLanguage
morphunPath
morphunModelDir
morphunDescription
isMorphunDownloading
morphunModelPath
init:removeLanguages:
Some language's assets were not updated: %@
All language assets were updated successfully.
Languages to update: %@
No languages were asked to be updated
Languages to remove: %@
No languages were asked to be removed
+[MorphunAssetsUpdaterDaemon convertXPCStringArrayToNSArray:]
/AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/Morphun/Morphun-61/morphunassetsupdaterd/Daemon/MorphunAssetsUpdaterDaemon.m
com.apple.private.siri-morphunassetsupdaterd
com.apple.siri.morphunassetsupdaterd
com.apple.MobileAsset.MorphunData
MorphunAssetsUpdaterDaemon
Found asset for language "%@": "%s"
Downloading assets catalogue for %@
Assets catalogue failed to download: %@ (%ld)
Successfully downloaded assets catalogue.
Language "%@" needs update? %s
Asset download progress: %lld of %lld
Asset requires %lld bytes, starting download...
Asset download failed: %@ (%ld)
Asset for language "%@" updated. %lu previous assets need to be purged.
Purging old asset failed: %@ (%ld)
Not enough space to download asset, size=%lld
Installed assets query failed: %@ (%ld)
Warning: Asset query results are empty
Purging asset failed: %@ (%ld)
Found asset for language "%@"
MorphunAssetsUpdaterDaemon
MorphunAssetsClient