how to perform code review among different types of developer?

My develper team includes Android, iOS, PHP, Web Front, .Net developers, but every type of developer only 1 person, and they don’t know other’s programming languages very well.

We have setup Jenkins with some static analysis tools such as Sonarqube, but it’s not enough to find out some logic mistakes.

Is there any suggestion on performing code review in this kind of team? Thanks a lot!