Your people have been here for one thousand years and more, longer even than this country here. Much, much longer. Yet they'd tell you to leave if only they knew who you are, what you are. But they don't, and you hardly don't.
Your Spanish is broken, self-taught because your dad wouldn't, not even your grandma would. It's practiced in retail selling credit cards to people who can't afford them, and not at home with family. Your recipes are a mix learned from your mom and that grandma, to your step family, and even the ever present internet. Your name? It looks French, people say, even though it doesn't at all to anyone with even a passing knowledge of that language or this name. It's pure Mexican, so pure not even a lot of friends know it and are amazed to hear that you're not really white. There's others with it though, some looking far less French than you.
You've never had a quince. You never set up an ofrenda. You never dealt with la chancla. You got the hugs and kisses and mijas and sweet things ending in -ita, and you always had the food and more of it because you're too thin, mija. You have so little though. So little that when you look at yourself in the mirror you see a ******.
Toss away that guilt though. Get back what you can and more. Don't be like your father ashamed of what Spanish you know. You're a Mexican too, you just have to practice more.