Thats my point...i have no idea what those kind of peppers are nor that they exist so i can not expect that there is a diiferent meaning to red pepper elsewhere so my recipe likely would call for a red pepper thinking everyone red peppers were bells.
While there are other peppers that are red here those would be call something different than red pepper...aka salad pepper, bird pepper, hot pepper etc. if i go to my favorite pizza joint snd asked for red peppers on my pizza they don't question what i mean they know that we are both talking about bell peppers.
Just like green peppers, here it means a green bell even tho we also have poblano, habinaros, jalapeños etc that are also green but never referred to as such.
And one more example that occurs to me...i once worked at a movie theater...we sold popcorn...salted buttered popcorn...we just call it popcorn...a trio of people come and order some and i dutifully scoop it up and hand it to them. The third man in the group pinches some popped kernels off the top and tosses them in his mouth and promptly makes a face and spits them out into his hand and tells me i forgot the sugar. Now american popcorn does not have sugar...he does not know this and is from another country and i do not know that popcorn in the country that he is from is sugar coated. I now realize his popcorn is our kettle corn but at the time kettle corn was not very well known here so i had no idea why the dude was expecting sugar on his popcorn but the two other people explained he was for someplace else and it was ok and took the popcorn for themselves and got him a candy bar which he dealt with much better.