The European Union currently consists of 27 member states but it is still willing to 'get' (kolokw w tym tekscie - poszukaj inne slowo) new members whose capabilities would make this organization stronger and more effective in terms of dealing with the problems THAT the UE is (currently?) facing. 'It goes without saying' (tego nie pisz, to jest twoja opinias nie fakt-napisz to inaczej) that it is Croatia that really stands out among other would-be UE members and its full entry into this organization might well be only a question of time.
Once the' above-mentioned' (to mi za bardzo wyglada po polsku - wystarczy 'this process) process had been completed, there were a number of other fields (called chapters) on which Croatia was obliged to work. Firstly, 'this country' (nieladnie, 'napisz 'the') focused on the chapter concerning science and research and these negotiations were closed in 2006. Secondly, intellectual property was 'taken an in-depth look' (investigated in-depth) 'at' (niepotr) by Croatian lawmakers.
On the 9th of December 2011 the accession treaty was signed and from that moment on the possibility of 'Croatia’s' (tutaj normalnie Croatia) joining the European Union has been far more realistic.
Although Croatia’s accession is foreseen for 1 July 2013 (unless any member state votes against) there are 'a lot' (nie pasuje tutaj, zly register, napisz 'numerous') problems that prevent both the European Union and Croatia from being entirely positive about the EU enlargement. First of all, the European Union is going through a difficult period of disunity and financial uncertainty, which makes it harder to welcome THE next Balkan states with arms open. As a result, European leaders are more interested in taking care of their countries rather than in working on furtherING 'Balkan enlargement' (nie, to jest zle, bo wyglada tak, jakby bylo powiekszego Balkan states). What is more, 'there have been' (niepotr) numerous politicians expressED their concerns about Croatia’s accession.
In addition to positive 'alternations' (nie, poszukaj inne slowo), there might be some obstacles in trade or political relations and this is what they are fearful of. According to THE experts, it is Bosnia and Herzegovina that 'can' MAY be the most affected in the event of its neighbor’s 'entering' ENTRY into the European Union.
Furthermore, Croatia will have to abandon the multilateral agreement on free regional trade, which can spell 'a' (niepotr) disaster on Croatia’s economic relations with other Balkan states.