Quinoa (Chenopodium quinoa; (/ˈkiːnwɑː/ or /kɪˈnoʊ.ə/, from Quechua kinwa or kinuwa)
If you are not a native Spanish or Quechua speaker, I think "kin oh ah" will get you what you want in the market. There may be some variation in various Spanish and indigenous dialects. In the US, there is often a difference in the names of Mexican foods in Texas and California. "Chalupa" is an example.
Even in English, there is a big difference in the meaning of the word "brew" in the US and UK. Either way, expecting one and getting the other is a big disappointment.
"After cooking, ..., quinoa is 72% water, 21% carbohydrates, 4% protein, and 2% fat." It is also "gluten free."
Quinoa originated the Andies, but it is cultivated in Spain and Germany. In Germany, it may be sold as "Andenhirse," or Quinoa.
When you buy it, listen to the way the person who sold it to you speaks.
It may be useful or not.
There is a story about how to pronounce Hawaii.
Two mainland guys were unsure and asked a man wearing a lei on the streets of Honolulu.
The Hawaiian guy said Ha Va EE, so the two guys said "Thank you."
The Hawaiian guy replied, "You're Velcome."
I think you might have had to have been there.