If only language is the barrier why can't we choose a player in the squad or among the officials who is good at English or whatever language the coach will speak. Seriously how much trouble Bulbul has teaching Cricket in China.
Get a good coach who carry strategy, plan and vision along with good track records, not necessarily a great player.
Human mind has all the power, when your mind is grind grit wins the battle. Go Bangladesh. Be the world number one in Test Ranking.