size of button

When I start minecraft upper than 1.7.2(I will tell you by 1.7.5 for example)
I am Korean so I set language to Korean.
But when I swich, button(Like Single player, Multyplayer...)
and inventary, GUI(I think it means a line whan I play, bottom),
and every thing is be very small. I try to upgrade my grapic card, format my computer...(and so on) But is always be small.......
I can't play with English!!!!! (I test and it be small at Japanese, indian...etc sorry about that)
plaese fix this bug....... I can't see because it is too small!!!!
P.E:Version that be small(when translate to Korean) has 'Must use unicord font : yes(or no)... Does it effect?
and when I play snapshop 14w20b(or upper) I can't build redstone by a way.( It be like ----- and ㅣㅣㅣㅣ so I can't...)
Mojang! please fix the bug that made small! (I try GUI size butten...etc. I tried all at minecraft what I can do.) plaese fix bug!!!!!!!!!!!!!