Add settings to telemetry

[Benhalor]

The following settings should be added to the telemetry protocol
language : [u8,u8]

The language is represented using 2 letters according to iso-639-1:https://en.wikipedia.org/wiki/ISO_639-1
each letter is encoded to its ascii representation in u8

Example :
france iso code is "fr"
f representation is 102
r representation is 114
the following array should be sent : [102,114]