* vicuña.
But I guess importing letters from different alphabets is the limit.
EDIT: Actually ñ is a letter in the Spanish alphabet, so in this case, English has imported a foreign letter.
English will spell it as vicuna, vicuña, vicugna (like lasagna), vicunia, and vicunya, all at the same time, and Español will sit down and enjoy it, if it doesn't want its vowels mispronounced in an entirely new way.
“originated as” is vastly more accurate than “is”; you wouldn't say that thing between the numbers in “1 + 2” is a ligature for the letter pair “et”, would you?