Bologna is sometimes referred to as the gastronomic capital[ of Italy/the world??]. Bologna is sometimes referred to as the gastronomic capital[ of Italy/the world??].

Indeed, pasta bolognese as well as many kinds of cheeses and other dishes were minted there. Indeed, pasta bolognese as well as many kinds of cheese and other dishes were minted there.

The plural is taken by the word KIND here --> kinds of cheese The same thing applies to other descriptions, examples: "many colours of paint". <----- colours (plural), paint (singular) "five hundred bars of gold" <----- bars (plural), gold (uncountable) "many days of happiness" etc. Also re: "minted", yes it makes sense but only if you want to make the sentence sound unusual -- more common: "... originated there." "... were first made there." "... were created there." "...were produced there." "... were born there."

Indeed, pasta bolognese, as well as many kinds of cheeses and other dishes were minvented there. Indeed, pasta bolognese, as well as many kinds of cheeses and other dishes were invented there.

'Minted' is quite uncommon in English - it would make more sense in this context to use a word like 'invented' or 'created'.

Indeed, pasta bolognese as well as many kinds of cheeses and other dishes were minted there. Indeed, pasta bolognese as well as many kinds of cheeses and other dishes were minted there.

I suppose it's uncommon, but I personally like the use of "minted" here

As a souvenir, I bought a second-hand book about American history as a souvenir at a local flea market. I bought a second-hand book about American history as a souvenir at a local flea market.

The way you wrote this initially works ok, but it would sound more nautral to put this clauses within the sentence.

I also dived intosampled the local cuisine and, overall, greatly enjoyed my trip. I also sampled the local cuisine and, overall, greatly enjoyed my trip.

'Dived into' is ok, but it sounds a bit unnatural. I'd use a verb like 'sampled', 'tried', or 'experienced' when talking about trying new food. You don't need to add 'overall' but it makes the paragraph stronger by wrapping up the thought.

I also dioved into the local cuisine and overall greatly enjoyed my trip. I also dove into the local cuisine and overall greatly enjoyed my trip.

I don't feel like "dive" is the right word here, but I'm having trouble thinking of an alternative. Maybe "I also fully immersed myself in the local cuisine..."