Product: I haven't figured out the target audience. The two potential groups are non-native speakers living in English speaking countries and people living else

Product: I haven't figured out the target audience. The two potential groups are non-native speakers living in English speaking countries and people living elsewhere who use English professionally. Which do you think has a more compelling potential? The target use case is the next question. What will people want to edit? Important emails? Marketing copy? Documentation? I'd guess that HN is mostly native English speakers in the US, but please leave a comment if you have any thoughts as to where I should focus the product or think of any cool use cases.