Bardzo proszę już o sprawdzenie tych kilku zdań :) Obiecuje, ze to juz ostatnie :)
You are working (have worked) in our company for a long time, in addition you are very responsible and honest employee so I might consider raising your salary.
I can offer (I could propose you) you 10% increase but only if you complete a Spanish course, organize the Annual General Meeting and also if you go for 3 months on delegations to Germany.
I am ready to accept a 10% increase and can guarantee you free place on a company parking, however I don’ t agree, you come to work half an hour later than the others employee.
In that case in the next month your salary will be higher, but I am waiting for the projects by the end of the month