my additional comments:

There must be many American have senses of alienation due to their facial appearances,

as NewVoice said, good use of alienation! maybe a sense of alienation? I would suggest: have senses of alienation-->feel alienated from their ...

the mother language: either use mother tongue, or native language, not a combination of the two.

eldership?

I’ve never thought to work hard like an immigrant, though my identity is.-->though I am.?