barbarize

verb3

1. •
   To cause to become savage or uncultured.
2. •
   To become savage or uncultured.

   • The Roman empire was barbarizing rapidly from the time of Trajan. — 1839
3. •
   To adopt a foreign or barbarous mode of speech.

   • The ill habit […] of wretched barbarizing against the Latin and Greek idiom, with their untutored Anglicisms. — 1644