first language 
noun
A person’s native language: she speaks Tiwa as her first language...
- That sentence wasn't written by anyone who speaks English as a first language.
- Announcers still have to come up with something to say, and they often don't speak English as a first language.
- Managing workers who don't speak English as their first language is tricky.
- hand labor
- hand laborer
- hand labour
- hand labourer
- hand-laid
- hand language
- hand-laying
- handle
- handleability
- handleable
- hand lead
- Hand, Learned
- handlebar
- handlebar moustache
- handleberry
- handled
- handle dish
- handleless
- hand lens
- handle (or treat) someone/thing with kid gloves
- handler
- handless
- hand letter
- hand-lettered
- hand lettering