Simplify the following text for a Grade 10 native English-speaking person.
Original: Many nitrogen compounds also contain the `` azide '' or `` azine '' letters , such as hydrazine .
Simplified: Lavoisier 's name for nitrogen is used in many languages ( French , Polish , Russian , etc. ) and still remains in English in the common names of many compounds , such as hydrazine and compounds of the azide ion .