Alexander Sabino Argüelles[a] (born 30 April 1964) is an American linguist notable for his work on the Korean language.

An avid language learner, he was profiled in Michael Erard's Babel No More.

He has taught in South Korea, Lebanon, Singapore, and Dubai, and was a Group Director of Immersion Language Programs at Concordia Language Villages in Bemidji, Minnesota.

He advocates working on multiple languages daily for shorter periods (as little as 15 minutes), working on different areas in different languages, from reading novels, to writing grammatical exercises.

[11] Argüelles is highly proficient in 10 languages: English, Spanish, French, German, Italian, Portuguese, Dutch, Catalan, Swedish and Korean,[5] and is accomplished in many more, such as Latin, Greek and Sanskrit, which he had studied by the end of college.