I think quite a large number of people in the world can communicate in English, even if they are not from North America, UK. Australia. It just so happens that English is the main language for communication in the world. Especially in IT, which includes routers and their firmware. I have been to about 25 countries around the world and I have never encountered a problem communicating in English. Also, modern technology such as, for example, Google Translator allows most people who are able to flash router firmware, to understand what is written in the manual for the firmware, to understand the description of the fixes in the firmware, and hence what people write in this forum. Everything is in English.
Well, right now, I checked the download log for this particular firmware version. 12 downloads. From Poland, Germany, Norway, Finland, Austria and USA. So it's quite a common model. But you're right, most of the downloads are from the US.
By the way, it's interesting that US users are offered a service: for only $75 to install Voxel firmware on their LBR20:
https://thewirelesshaven.com/shop/s...oxel-firmware-customer-device-update-service/
If helping to flash my firmware is a selling point and profit for someone, I think the LBR20 is not such a rare device, and its owners are aware of the existence of the SNB forum and read Voxel announcements in the forum about the release of new firmware.
It's more profitable to pay $75 to someone instead of saying 'thank you' to Voxel and asking for his help for free. It's a crazy world.
Voxel.