I wishhope that I will spenthave a good time with them, (be)cause they are very funny.

'Hope' is more natural here.

'Spent' is the past participle of 'to spend'. To use the future tense, you use pronoun + will + verb in the infinitive (in this case 'spend').

'cause' is the informal version of 'because' so you would only say 'cause' in spoken English, rather than written. And it is written like 'coz'.

I also hope that I will bring when I will come back , I will be able to bring some pasta and cheese, with me, because I love it.

This order if the phrases seems more natural than what you put.

I added "with me", just because it's a bit clearer for the reader.

Make sure to end sentences with a full stop.

In the summer I would like to go into Sardinia.

I’m going would go with my friends.

I wish I will spent aant to have good time with them, because they are very funny.

I also hope that I will bring when I will come back I will bring some pasta and cheese, because I love it

In the summer I would like to go into Sardinia.

I wish that I will spentd a good time with them,cause they are very funny.

I also hope that I will bring back some pasta when I will come back some pasta and cheese,cause I love it

In the summer I would like to go into Sardinia.

I wishhope I will spenthave a good time with them, because they are very funny.

I also hope that I will bring when I will come back some pasta and cheese,some pasta and cheese with me when I come back, because I love it.