Here's why and some alternatives:
* "Argentium" is a brand name: It refers to a specific silver alloy created by the company Argentium Silver. So, "argentium" itself is the most accurate English translation.
* "Argentium silver" is the most common way to refer to it, emphasizing the material's composition.
* "Silver alloy" is a general term that covers all types of silver mixtures, including argentium.
* "Sterling silver" is a commonly used term for a specific silver alloy, but it's not a direct substitute for argentium.
Therefore, depending on the context, the most appropriate English word for "argentium" would be:
* Argentium: When referring to the specific brand and alloy.
* Argentium silver: When emphasizing the material's composition and brand.
* Silver alloy: When discussing silver mixtures in general.
Remember, the best word choice will depend on the specific context of your use.