* Loanwords: Words borrowed from other languages, like "kilogramme" (kilogram), "koala" (koala), and "ketchup" (ketchup).
* Proper nouns: Words referring to specific people, places, or things, like "Kant" (the philosopher) and "Kenya" (the country).
French adjectives generally do not use the letter "K". There are no common, everyday French adjectives that are spelled with a "K".
If you're unsure whether a word is an adjective and how it's spelled, it's always a good idea to check a dictionary or a reliable online resource.