I always put and encourage the English names to be used in "name", if a tag is in a non English speaking country, add the local name with the local language tag. tag. This is tricky though, some English names aren't appropriate if a place has no English name but Welsh locations should be in English for example. eg SHEFFIELD: name=Sheffield name:fa=شفیلد name:ja=シェフィールド Amongst many others. That means the default English interface OSM always shows in English but with http://toolserver.org/~osm/locale/en.html can show the local name when the local language is selected.selected. I wouldn't advise changing the name of Lyon which in American is spelt with an S at the end.

I always put and encourage the English names to be used in "name", if a tag is in a non English speaking country, add the local name with the local language tag. eg SHEFFIELD: name=Sheffield name:fa=شفیلد name:ja=シェフィールド Amongst many others. That means the default English interface OSM always shows in English but with http://toolserver.org/~osm/locale/en.html can show the local name when the local language is selected.