barbarize

verb (used with object), bar·ba·rized, bar·ba·riz·ing.

1. to make barbarous; brutalize; corrupt: foreign influences barbarizing the Latin language.

verb (used without object), bar·ba·rized, bar·ba·riz·ing.

2. to become barbarous; lapse into barbarism.
3. to use barbarisms in speaking or writing.

verb

1. to make or become barbarous
2. to use barbarisms in (language)