For a 10-person startup, that's fair. For a company like Google , with offices in Germany and France and hundreds of engineers from any nationality, not so much. Other companies fall somewhere in between based on their headcount and global reach.
Plus it's all about profit margins. Investing in tons of testing for not enough return from users means they just won't do that.
I'd imagine you'd need multi-lingual testers to use the product too, not just a native speaker given a foreign keyboard. There's no way to find bugs an average user would face with normal use.