Thiago Alcântara has been temporarily employed at Barca in Hansi Flick's staff.
As reported by Diario Sport, the famous "Barcelona" football player is the key link between the team and the coaches. He carefully interprets any explanations and instructions from Flick to the players.
Hansi, as mentioned, already speaks broken Spanish but still has a lot to work on.
Thiago will help Flick with communication and translation for a while but does not want to be tied to Barca in the medium or long term.