It's a mistake to imagine that Google has some kind of centralized "programming languages" organization[1]. The people who designed Angular have probably never even met the people who designed Go, much less been influenced by them or shared influences. Same for TensorFlow. There may be "PL enthusiasts" at Google but the things they do at work are the same things everybody does at Google: moving data from one protobuf to another.

1: There is a "language platforms and tools" group (I used to work there) but its mission is stewardship of existing languages, not development of new ones.