how to import geonames data to JOSM (SD.txt)

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I want create map like this. based on OpenStreetMap?
Postitas mustafakamil kuupäeval 24. november 2016 – English.new arabic font on the map is awesome …
I want make island on Nile but Does not appear as required
Postitas mustafakamil kuupäeval 8. aprill 2016 – English.What are the Benefits of GPS Tracking
Postitas mustafakamil kuupäeval 5. september 2015 – Arabic (العربية).…?What are the Benefits of GPS Tracking to openstreetmap
I use Ubuntu 14.04
Imagery menu select Bing
come