The most common example is the kind of small restaurant selling light meals and drinks, with its 2 spelling versions:
café and cafe.
Did you know that smorgasbord also has two official English spelling versions in dictionaries? So, you can use the original Swedish spelling, too: smörgåsbord.
Piñata (an object in the shape of an animal, etc. that contains sweets) has a ‘more English’ version, ‘pinata’, but the original Spanish spelling is preferred.
And the word ‘naive’ also has another official spelling, with a weird ‘i’: naïve.
Now, what is this knowledge good for? 🙂 Mostly, to entertain yourself and your students because it’s fascinating. Isn’t it? 🙂
FAST ENGLISH WEEKLY TIPS ⏩