Ok, quick history check of former Barca managers
Since start of Barca rebirth under Laporta:
we had 6 managers
the last 5 of them (start of our local domination with pep) were native Spanish speakers with
4 of them Spanish themselves, first two came from within the club, last two came from Liga with history attached to the club.
the 5th of Spanish speaking was the only true failure.
The 1st out of 6th managers were Rijkaard, he spoke Spanish fluently before he arrived from his time in Liga (he even had problems with Rustu being non-spanish speaker)
before that I don't know which coach we hired that didn't' speak Spanish but last 4 were :
Antic (spoke Spanish due coaching there) LVG in 2nd time so he probably spoke Spanish too
Rexach & Ferrer who were from Spain.
So if I am gonna take a guess, our last coach who came while not speaking the language was LVG back in 1997. 21 years ago.
Point is, there is small chance we are going for one of those foreign managers who doesn't speak the language. That rule out Tuchel/Sarri/Allegri
That is why I am a bit hesitant in firing EV (unless he really lost dressing room) because the most likely replacement will be between Eusebio and Unzue. Good coaches themselves but worse than EV IMO.
Gerard Lopez probably has bigger chance than Sarri, so careful what you wish for folks