i Register
In some senses, lingo is marked as informal. Watch for register when choosing this word.
noun
Language, especially language peculiar to a particular group, field, or region; jargon or a dialect.
[...] I have Thoughts to tarry a ſmall Matter in Town, to learn ſomewhat of your Lingo firſt, before I croſs the Seas.
"You see, ma'am, I can't divest myself of my professional lingo," observed Mr. Banks.
An Aboriginal language.
The huntsman spoke Davey’s lingo.
Granny Ava was the link: the last heathen of the family to speak the lingo fluently, before the Church waltzed in and jammed the Lord's Prayer in Granny Ruth's twelve-year-old mouth instead.
name
A surname.