Get what youre saying, but a lot of our players doesnt speak much english. I honestly would think it better to get a manager fluent in Spanish/French/Portuguese.
Yeah, this seems to have been on the list of requirements and the reason for hiring Martinez, Koeman (who i assume is decent in spanish after 7 years at barca) and Silva. And it's a good reason to romanticize about getting Arteta in.
And yeah, I'm not aiming at this from the worst far-right angle here, I'm thinking man management. The manager has an obligation to stay in touch with the players and the fans, to speak their language and say the right thing. I hate to sound clichéd but i think Solskjær is a good example. He shows that a certain youthfulness, cultural understanding and actual ability to express yourself is good for the players too. Martinez was pretty good at that, except for the inability to say something negative when it had to be said.
Thing is, both Silva as well as Ronald and Sam were awful at "getting it", or showing that they got it, and they struggled at this whole feeling of being caged in, disconnected, not on the wavelength. They are speaking their own language instead of learning ours, i guess.
As an example,
I'd urge you guys to have a look at Silva's last post-match comments. He's clearly uncomfortable with the loss and all, but his ability to express himself is simply not there. If he can't express him self on camera to the fans in the post-match, a crucial part of any managers' job, how does he do so in the dressing room?
To summarize: It's not necessarily a language thing. But a question of being able to express yourself - and to be accurate about it.
