As a Swiss I also live in a high foreigner area. My sons are playing with children from Peru, Eritrea, Ecuador, Czechia, Sri Lanka and Italy. It's a really nice place to live, there are many children. Additionally, my wife is Asian.

If you worry about a high percentage of foreigners, you shocks probably stay away from Zurich or Switzerland in general … yep, Schwamendingen is apparently not where the rich live but it looks like a decent place with many green areas around and good public transport.