Common expression

The "@" symbol. . .
used by grocers and accountants throughout the English-speaking world to indicate a rate, or cost per unit, as in "10 gal @ $3.95/gal" [ten gallons at three dollars and ninety-five cents per gallon] has become the de facto delimiter in e-mail addresses, separating the user's name from the domain name.
Although the change from at meaning "for a given amount per" to at meaning "in a specified (electronic) location" comes fairly naturally to English speakers, it does not for native speakers of other languages, for whom neither "at" nor @ meant anything until e-mail came around.
Indeed, a fair number of internet users live in countries that don't use the same alphabet English does (Japan, China, former republics of the Soviet Union including Russia, and Arabic-speaking countries, to name some major ones), and where the keyboards did not conveniently include the @ character until after it's widespread use on the internet made it a necessity.
As a result, while in some languages @ is simply called "at," in others, a wide variety of interesting nicknames have been developed for this little symbol. Most are based on the shape of the character, others are more abstract. Some are original and unique, others are derived from other languages. Some have ancient antecedents, others are still "works in progress." (Internet users in Sri Lanka are even now trying to decide what to call @). In some countries, a variety of ideosyncratic names have appeared simultaneously, while in others, government beauracracies are charged with selecting an "official" term.
Metaphors range from animals (snail, worm, little dog, horse) to body parts (elephant's trunk, monkey's tail, cat's foot, pig's ear) to food (rollmops herring, strudel, cinnamon roll, pretzel). This article includes a sampling of the many names of @, world-wide.
English
Some English speakers call @ "commercial-a" or "commercial-at." Also heard in English:
o mercantile symbol
o commercial symbol
o scroll, or scroll-a
o arobase
o each
o about
o vortex
o whorl
o whirlpool
o cyclone
o snail
o schnable
o cabbage
French
In French, @ is called "arobase." Probably derived from Spanish "arroba," the word has no other meaning; it is simply the name of the symbol. It is also referred to as "un a commercial" [business a], "a enroule" [coiled a], and sometimes "escargot"[snail] or "petit escargot" [little snail].
German
In German, @ is most often called either "Affenschwanz" [monkey's tail] or "Klammeraffe" [hanging monkey]. This is also a term of zoological classification, for various South American monkeys, including the spider monkey.
Some people call it the "Ohr" [ear].

see the site below for a whole series of languages: