The interesting thing is that you don’t pronounce the “u”. 

In cases such as quarantine, it is translated to Spanish as cuarentena. In this case you pronounce the “u”

They always follow such as queso, boquete, querer. 

But only followed by “e” or “i”

Carresan

@riberet19 & @Carresan, to what extent does U follow Q in Spanish? Do let me know! 

cryotosensei

Stacker Saloon

saloon

They do in Spanish and French (unless the q's at the end of a word in French).