Growing up with two languages is a gift, and it does not cause reading difficulty. It can make dyslexia harder to spot, though, because a slower start with English words can look like a language issue when it is really a decoding one, or the reverse. A useful tell is whether the trouble shows up in the child's stronger language too, and whether it sits in connecting sounds to letters.
For bilingual and multilingual families: what did you see, and who helped you tell a language gap from a reading one? What do you wish teachers or evaluators had understood about your home?
Lillory teaches the sounds and spellings of English directly, which helps any child who is still building the language. But your experience is the part no guide can give, so please share it.