Selected for grand jury but can’t speak English?

For some context, my mother doesn’t speak English too well. She can somewhat understand it but not enough to speak back fluently.

We didn’t respond to the original summon because it was sent to our old address. However, my dad picked up our old mail recently and we saw that she was selected.

Will they still allow her to act as a grand juror given the language barrier? If so, Additionally, can she postpone it for some time?