Ferengi language
The Ferengi language was the spoken and written language of the Ferengi used on Ferenginar.

Written language 

Ferengi writing looked much like a flowchart, with many sixty degree angles. Text radiated from the center outward, which indicated the direction of writing as well. Ferengi text could be written with or without a central hexagon, radiating from one side of a hexagon only and in single horizontal lines on signs and short notes. (; ).

Keiko O'Brien's classroom featured a chart depicting the English, the Bajoran, the Cardassian, and the Ferengi alphabets. The chart listed some sixty-plus Ferengi language symbols. ()

Odo could read written Ferengi. ()

Spoken language 
Because Ferenginar experienced near constant rainstorms, there were 178 different Ferengi words for types of rain. Because of the high humidity, there was also no word for "crisp" in Ferengi. ()

Words and phrases 
DaiMon – a rank given to one in charge of a starship; roughly analogous to a Federation captain. ()
Gren – You ()
glebbening – an especially severe rainstorm ()

Kora noosa? – Anything? ()
Lahje – here ()
Lat – to (such as between the names of a sender and recipient, when hailing someone.) ()
Latinum – Ferengi currency. ()
Lobeling – a child. ()

Moogie – (informal) "mom" or mother. ()
Nagus – a title of authority; esp. Grand Nagus, leader of the Ferengi Alliance. ()

NanDi – Excellent ()
Nass – No ()
Neep-gren – Thank you ()
oo-mox – massage of the ears, a sexual practice. There was no non-Ferengi translation for this word. ()
Yoba – Brother ()
Yop – I ()
Yop-im too – I'm sorry ()

Examples of spoken language 
The following comes from the script for :

Keh-ee Yoor-ee Dah-teh-ee… 

The first part of Tog's computer security access code. 

The following examples are from the script for :

Goss uff wok ton. 
Let us out of here.

Brik yop tal hopdrew, ki los hoem bog?
If I jumped off a roof, would you do that, too?

Gren fatarik oo-mox?
Unknown, may mean something like "What do you say I teach you how to oo-mox?"

Ya ta fa?
Unknown, may mean "Is that a yes?"

Gren fa hoe loth pex-pil? 			
Haven't you got that translator fixed yet?

Vo yop toe pah?			
Can I have that?

Yop triska gleep do-sta gren-la. 			
I need that metal thing you're holding.

Neep-gren. 
Thank you.

The following examples are from the script for .

Irr zoun nagool ahsp.
They're not responding to hails.

Cucht eeta ekrajhn-voy?
What do your scans say?

Irr gnales. Nohm setron quetsivoo!
They're alive, but unconscious. It worked!

Vaneeday.
Take us in.

Cucht nee va zeh?
Do you know this species?

Y-solah-na.
This way.

Tenda sout bazul. Ningor.
It's not on this deck. Let's go.

Gar-day latinum sou-tah!
This is worth its weight in latinum.

Sapa-moul!
Don't touch it!

Ehj saf-rey tomen-dee.
I know how to deactivate it.

Konah see-oh-mahj irr zoon.
The fools never knew what hit them. 

Orink!
Look at this!

Senpa tah-moy. Lorala rrela!
She's beautiful. Exquisite lobes!

Latinum soun teyvalah
She's probably worth a thousand bars of latinum.

Ulis tenda vool.
Ulis is waiting to hear from us.

Sop moepree.
We're clear.

La-voy Daemon.
This looks like the captain.

Letra deemo mirra!
Don't touch anything!

Klaxut.
Go ahead.

Feesha vou dole!
We hit the jackpot!

Ree-jahvey.
We'll be right here.

Guzah puh naam.
Their medicines might be valuable.

Sel tre-oght da-techt.
Roughly "Take all possible."

Ehj ocuuz sahfi?
What about the equipment?

Guzah louz.
Medicine first.

Ingala habi.
Wake him.

Ingala duk habi?
Do you command this ship?

Duk habi nakustra?
Are you the Captain?

Bok megoron duk…?
(Roughly Do you understand…?)

Appendices

Background information 
The spoken Ferengi from  seems constructed differently than that spoken in , though the two may be different dialects/languages.

Ferengi statements that were scripted for but don't feature in "Acquisition" include:

Lir rrela toh teepah.
Their lobes are so small.

Yrutu mahs.
She's mine.

Ehj voyet!
I saw her first!

Rrela pik'tabol…
With those lobes…

Sen-pah tou!
I found another pretty one!

Apocrypha 
According to Star Trek: Deep Space Nine (Pocket) novel The 34th Rule, the Ferengi language has fifty-seven words for "customer." According to the novel Time's Enemy, there are also several words for "no," depending on how much negotiation it will take to change someone's mind.

Frinx was a Ferengi expletive used in a number of different novels, including The Fall of Terok Nor, Inferno, and the Star Trek: Titan novel Orion's Hounds.

External link 
 

de:Ferengi (Sprache)
fr:Ferengi (langue)
Ferenginar
Languages