We (a gdzie WILL?) begin about 20 (20 czego ludzi? godz? w ang. lepiej 8p.m.) and the party will continue UNtill morning. Come with 'someone'(tutaj lepiej 'with a guest').
I invite you TO A disco on Friday the 31st OF September. Ticket costs 10.(10 czego?)
Please, 'endorse' (nie, slowo endorse tutaj nie pasuje - nie jest uzywane w ten sposob - szukasz slowa 'confirm') your 'coming' (nie, lepiej 'your attendance').My TEL. number IS 654351351
I would like to invite you to 'A' night marathon OF films (niewiem jak inaczej to nazwac). 'It' (dlaczego 'it?' - aha, jak on-ten marathon, to lepiej...during the marathon, many comedy films will be shown) will be displayed comedy films. THE show is free. 'That' (Moze lepiej ..'It' will be nice, so you JUST have to come.
I would like to invite you TO A party for academic teachers in 'THE restaurant at universitY' (lepiej ..the Univerisyt Restaurant) on Friday the 31st OF March. You should 'wear elegant' (jest cos takiego jak... Formal clothes') clothes. 'It will be the salmon, chicken, salad, fruit served' (nie, zmien to na ang. gram - There will be....fruit being served)
Please 'about' (dlaczego about? co to tutaj robi?) telephone confirmation 'coming.'(to twoje zdanie niema zadnego sensu)...Please confirm your attendance by telephone)