Translation guide
Argentina is a country name. In Japanese, it is typically written in katakana as アルゼンチン. There is also a kanji form 亜爾然丁, but this is extremely rare and historical.
Referring to the country Argentina
Standard modern Japanese name for Argentina. Used in all contexts.
アルゼンチンは南米にあります。
Argentina is in South America.
アルゼンチンに行ったことがありますか？
Have you ever been to Argentina?
Ateji (kanji used phonetically) for Argentina. Extremely rare, mostly historical. Not used in modern Japanese.
亜爾然丁はかつてそう呼ばれた。
Argentina was once called that.