> fix for proper official name by Official change of German Foreign Ministry
for official name by official change of German Foreign Ministry you shoud use: official_name:de=Kyjiw

> and all of then will use new name
Leading German news portals and daily newspapers continue to use the spelling "Kiew" instead of "Kyjiw" even after the official change by the Foreign Ministry. The official change by the Foreign Office consequently only applies to official federal authorities.
We understand your wish for a change and correct spelling. But OSM does not reflect wishes but facts. "Kiew" is the common usage in Germany. Changes take time. For some names of Ukrainian cities this was quicker, others, such as Kiev and Odessa in particular, will probably take longer. 
Which name or spelling in name:xyz belongs to native speakers of the language XYZ, not native ABC-speakers and not native KLM-speakers!
