Hi and welcome to the Brillkids community! You can search through old posts and find a ton of information. I would teach them to read in both languages if you are able. You will find that many members on here have successfully taught their little children to read in more than one language. My daughter (2y3m) has had daily exposure to Spanish and English since birth and can read in both languages.
Good luck on your EL journey! It's a lot of fun