Filter on multiple terms with OR

Is there any way in elastic search to filter on multiple terms. One of the field in our elastic document is language_code.
I want to set the filter in boolqueryfilter something like below
boolQueryBuilder.filter(language_code == en or language_code == ar)

Currently I am setting two filters, one with en and another with ar. But it is getting acted as AND.(get me documents where language_code is en and ar)
Is there any way to do OR in filter?