To translate a customtext field

Hi,
I'd like to add a customtext via Display>customfields> table address
I choose a "customtext" on field type
So, how can i have the text on two languages?
I just tried with a Joomla overrides but it does not work.
I tried with an hikashop translate field on hikashop file Language and it does not work.
How can i do?

Hi,
so I'm the second user to ask it!

But i have a problem.

On my version i have:
"return @$field->field_options;" (here there is the word customtext in square brackets)

if i change with:
"return $this->trans(@$field->field_options);" (also here there is the word customtext in square brackets)


I have the frontend and the backend on error 500

If i change with:
"return $this->trans(@$field->field_options);" (without the word customtext in square brackets)


There is not an error 500 but, on the text place, i have the word "Array"

What can I do?

PS: it is impossible to write the customtext in square brackets on this forum !?!?

Ok, now it works!
Thanks.

Will the new code be on the next release or i have to change it again?