The short answer
No. Your data. Shrink it from its app; don’t delete the folder.
What is it?
On-device speech models for Dictation, Siri and other speech features, one per language, kept in a protected system folder so speech can be recognised without a network connection.
On-device dictation models, one per language. macOS manages them.
What happens if you delete it?
macOS downloads a model again whenever its language is enabled for dictation or Siri.
How to remove it properly
Do not delete them by hand. Remove dictation languages you no longer use in System Settings › Keyboard › Dictation, so macOS can drop their models.
Don’t remove it by hand; macOS manages it.
How MoreRoom helps
MoreRoom recognises this as your data and never suggests deleting it. It shows how much space it takes, so you can shrink it from its own app.
Frequently asked questions
Can I delete Mac dictation and speech recognition models?
No. Your data. Shrink it from its app; don’t delete the folder. macOS downloads a model again whenever its language is enabled for dictation or Siri.
Will Dictation and speech recognition models come back after I delete it?
Yes. macOS downloads a model again whenever its language is enabled for dictation or Siri.
How do I remove Dictation and speech recognition models properly?
Do not delete them by hand. Remove dictation languages you no longer use in System Settings › Keyboard › Dictation, so macOS can drop their models.