In dictionaries, salt is defined as follows:
"A white substance tasting of sea water, used in food for flavoring or preservation. In chemistry, it is called sodium chloride and is either found in solid mass or extracted from waters in which it is dissolved. Metaphorically, it is used in the sense of flavor and taste."
In Kamus-ı Türkî:
Salt and bread; signifies sustenance and blessing, known as 'nan u nemek'. The right of salt and bread; signifies gratitude and indebtedness.
Idioms are the national stamps of language, born from the nation's ability to create speech. Each idiom is a delightful invention. A vast meaning is compacted into a small lexicon. The most fleeting concepts, the finest fantasies, the most beautiful metaphors, various metaphors, and word craftsmanship shine among the building blocks of a tiny idiom.
Idioms are the oldest words owned by society. An idiom is a phrase belonging to the general language, expressing a concept or situation either in an appealing narrative or a special structure, and most have meanings separate from their literal ones. The idiom 'the right of salt and bread' refers to the rights or the emotional debt one owes to someone who has fed and done good to them, used in the sense of "The acknowledged right or emotional debt one owes to someone whose hospitality and kindness they have enjoyed." It is a rich cliché encompassing concepts such as friendship, loyalty, camaraderie, fidelity, humanity, sincerity, nobility, and honesty, ingrained in Turkish history, literature, and folklore.
The phrase 'Let there be salt and bread'; is used in the sense of 'I offer you what we are eating, eat so that we may become close friends'.
Regarding idioms related to salt, dictionaries include phrases such as:
Salt Pepper Bread,
Turn to Salt and Ice,
I Should Salt You So You Won’t Stink,
To Become Salted Goods,
To Sit in the Salted,
To Explode in the Salted,
To Sway Like Unsalted Halva,
His Salt is Dry (financially secure),
To Sway Like Unsalted Halva,
To Think Like a Chicken that has Eaten Salt,
To Lay Salt,
To Extract Saltwater from Salt,
To Froth Like a Salt Camel,
Let there be salt and bread,
His Salt has Wormed,
To Add His Salt to Ash,
To Lick Ice Instead of Salt,
To Sleep Between a Load of Salt and Ice,
Not to Be the Salt of One’s Bread,
May My Bread Be Horse-Like and My Salt Blind You,
To Have Salt in the Soup,
Salt is Not Rubbed in an Open Wound,
Hungry with Salt, Satiated with Measure,
If Fish (Meat) Stinks, It Is Salted; What is Done if Salt Stinks?,
Tasteless Food Needs Salt, Brainless Head Needs Words,
To Have No Taste or Salt Left,
Tasteless and Unsavory.
There are nearly a hundred idioms and proverbs involving the word salt and related expressions in our language.