Traditional Vocal Beaming
This plugin sets beaming according to syllables:
If a syllable has only one note, that note gets a flag and is not beamed.
If a syllable extends over several notes (melisma), the beam setting is set to auto beaming.
Here is an example how it works for the beginning of the second Lied in Schubert's Winterreise:
Note: Because of restrictions in the plugin framework, the v3 version does not take care of stem directions yet. After running the plugin, you might need to do some other little change, to make MuseScore recalculate the correct stem directions.