Type english after number or symbol

hello

please help me when i want to add text or edit , the english letter typed before not after the number or sympol

for example i want to type : " 3 days "

it appears like this " days 3 "

same thing to symbols --> " days * " instead of " * days "

even when i copy it from another location ( from word for example ) it sill inverted !

note that this problem only with english language , arabic works perfectly , and only in adobe acrobat xi ( when i type english in another apps it works perfectly )

please help as soon as possible i have to edit some PDF's