language, speech: declare beta
language, speech: declare beta

Change-Id: I9a1e30b9e39d48426a21e91b952f78bbfa77d8bd
Reviewed-on: https://code-review.googlesource.com/12230
Reviewed-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>
Reviewed-by: Jonathan Amsterdam <e3d3698b2ccd5955e4adf250d0785062d0f9018b@google.com>

googleapis/google-cloud-go,googleapis/google-cloud-go,googleapis/google-cloud-go,googleapis/google-cloud-go