Hi All - my wife is German and I am Egyptian - we lived in London and now we live in Denmark. Our kids speak four languages and we have encouraged them to express themselves with languages. They have tremendous capabilities to soak soo much in. Especially during the early years- but just remember to remove all pressure. Encourage them and respect them at the same time. Sometimes we decide that we have dinner in one language - and another night we pick a different language (usually involves one parent eating in total silence- but ultimately learning as well). We certainly also use technology - and an app that has helped us (only if you have an IOS device is attached)- it has 12 languages or so and is meant for bilingual or multilingual kids like ours- we have loved it.
https://apps.apple.com/dk/app/babylectus/id1468885557
https://apps.apple.com/dk/app/babylectus/id1468885557