What do the two settings in the poem "Grandma Ling" tell you about the speaker's heritage?

Are you speaking of Grandma Ling by Amy Ling? If so, then think about it. The poem starts off with her in the US. In the second stanza, it speaks of her going to visit her grandmother in Taiwan. In the end of the of the Second stanza it described the speaker to look much like her grandmother. In the last stanza, the speaker tells you her grandmother speaks in a language she does not know, leading you to believe that her grandmother cant speak English. Knowing this information, what is the most reasonable conclusion you can make from it?