didn’t include “i”

Monday is the weekly meeting day. We were talking about something, which might relate with soccer. It could be the one of Japan vs Columbia. Somehow, Paula was friendly joking and said an, obviously, expletive, in Spanish.
Juliet was apparently scared a little, she spoke Spanish. Paula did notice Juliet’s subtle facial expression. She started to laugh. Moreover, Spanish seems quite similar as Portuguese, so that meant Samara could somehow get the point, which was true. Paula smirked and asked if Samara understood that word.
“Yes, we also have the very similar work, just without the “i” ”
She then asked me as well, I could only said that I didn’t understand but might guess what that was.
Then it flashed back to my high school years or even earlier.
I was somehow isolated from main group, or we can say, at least I noticed and was concerned about my potential isolation even if lots of teenagers were not hanging together all the time. Either way indicated my eccentric mind, so that this mind would be not surprising of learning speaking expletive.
Unfortunately, my intricate value and thought, or my natural born was so disagreeable with expletives. I clearly remember that, I was once so upset that I couldn’t get the high grade in the class, but nor could I be a free spirit at all. Talking four letter words is absolutely not a free spirits, even more I felt so sorry about myself having that hurting thought once.
Please, expletives, that past history, exclude me I beg.