In most cases, the refugee family you will be welcoming and supporting through your community sponsorship will speak little or no English before they arrive. This means that you will need to find people living locally who are capable of acting as interpreters from Arabic (or perhaps, Kurdish) to English and vice a versa. Some groups will have members who can play this role, but in other cases you will need to recruit and perhaps pay for interpreters. And in the early weeks of sponsorship, these interpreters will need to be readily available as the refugees do things like register for benefits or sign on with a doctor
Do ask around in your community, as existing groups have found it surprisingly easy to connect to Arabic speakers living locally who are willing to help.
You will need to show in your resettlement plan (see here) how you plan to provide interpreting services for your refugee family for the twelve months sponsorship.