Thank you,
Unfortunately, using a dictionary without knowing German was a bad idea - but I think that with your help I will be able to improve my mistakes.
None of the cemeteries has their own name so I should use “description” tag instead of “name”.
I think it’ll be good now:
description: de = Soldatenfriedhof (and similarly other languages)
landuse: cemetery
cemetery = war_cemetery
cemetery: conflict = WW1
Thank you for your help,
Krzysztof