I believe there is some confusion on the English side here. American English and British English don't use the terms jelly and jam the same. If I understand correctly, gelatina is gelatin (or Jello) to Americans and jelly to Brits. In the US jelly is jam without any visible fruit bits. When Americans point out jam, Brits usually call it preserves.
At least, that's what I've worked out after a humorous conversation in Ireland at breakfast.
British (specifically English) here. I don't think I'd call anything 'preserves' as such. We have jam - fruit and sugar boiled together until it sets then put in jars to be spread on toast/put in cakes at a later date. Marmalade - same as jam but with orange or lemon (usually). Chutney - fruits and veg preserved with vinegar to eat with cheese or cold meats. They are all generically 'preserves', but I would always call them by the specific name not the generic.
Jelly is usually what is called Jello in the US, though jelly can also be jam which has been strained to remove all the bits/seeds so that it is clear.
As I said I'm English, it may well be different in Ireland. Heck, it may well be different 50 miles down the road from where I was brought up in England. I'd understand what someone meant if they talked about 'preserves', although to me it could mean any of a range of things, sweet or savoury so I'd need more context or for it to be more closely specified.
In the US, "jelly" is fruit juice that has been gelled with sugar and added pectin. Jam has both the juice and the macerated fruit mixed with sugar to form a gel. Preserves are generally the whole fruit in gel. Marmalade is generally citrus, as noted above.
So, we have grape jelly, grape jam, and grape preserves.
Sometimes - 'onion jam' which is onions cooked slowly with other things to make an accompaniment to savoury foods. Although I've more often heard it referred to as 'onion marmalade'. But if you call something 'jam' (meaning food not heavy traffic), I'd expect something sweet made with fruit.
Il nostro cavallo è bello I nostri cavalli sono belli You need to pay attention to the predicates that get paired with subjects ( also articles and possessive adjectives). Il nostro goes with singular masculine nouns, and i nostri goes with plural masculine nouns. I hope this helps a little.
In Sweden jam contains more sugar and is less like jello in the consistency. You use it with waffles, pancakes and stuff like this. It's a dessert thing. Marmalade has less sugar and more fruit and is more firm in the consistency. It's only used to be put on bread. So, if you need to use context to find out which is referred to, in the morning we use marmalade, but can also be eaten in the evening with bread and tea. If it comes with an antipasto it will be marmalade and not jam. Otherwise, it's in all likelihood jam that is being referred to.