ACF field not changed in admin

hello,
I added a advanced custom field (ACF) for my custom taxonomy. and i show it in back-end using a filter in admin area.
by getting field value like this…

get_field(‘custom_description’, $term);

but this field is not changing according to language tabbed. I see that, data in this field in database are saved like this :
[:de]hello de[:en]hello[:]

but it show only “hello” in each language tab.

thanks in advance.