Email and chat support doesn't have this UX issue.
While there are occasional hiccups, more often our biggest complaint is time zone differences not language, since calls are routed to the proper language queue world wide. Our support staff is chosen for tech knowledge and comfort with language and customer service skills.
Now I mention userbase mattering since were primarily working with it professionals not your average computer user. There seems to be a higher likelihood that tech people world wide know at least some English or have someone in office who speaks it. If truly no one in the customer's business speaks English, we've gotten by on translate tools and a lot of patience and understanding. The rather specific nature of our product allows a narrower vocabulary to be used, and support works well even if we don't understand each other through spoken word.
This obviously couldn't work for all things - a large enough userbase tends to have no common denominator you can rely on. But if your product
Has a clear customer in mind with a certain background multi lingual phone support is plenty possible.