Translated - yes, professionally - no, notarized - no
Translator, however needs to be proficient in English and other language and certify translation by writing a statement.
I used an online agency for translation, there's many affordable ones. My reasons were:
- They do translations professionally and know how to do it
- They have all necessary templates
- They're a third neutral party between USCIS and petitioner. So nobody doubts translations are valid and not made up to get immigration benefit