Why does ChatGPT sometimes mix in Arabic words with my conversation?

Recently I’ve been noticing that some of the responses I am getting to discussions will occasionally have a word in the response in Arabic. The majority of the message will be in English but a word here and there will be in Arabic. This has happened about six times in the last few weeks. I do not speak Arabic so it always catches me off guard. Today I was discussing a word and in the response it said “ساده explanation”. When I asked why it used the word in Arabic, it said it was a “formatting hiccup.