Hi Walter,
since Garmin does not support Unicode, I have to use at least different codepages for Europe.
I use CP1252 for Europe and English/international names whenever possible. I think it is the best compromise, especially because some devices do not support required code pages, like for example there is no support for CP1250 on Edge. Multiple code pages would require multiple maps with separate indexes. To get correct routing between multiple separate maps, each map should have external routing nodes on boundaries. These nodes should be at the same position on adjacent maps. I guess mkgmap has no support for that kind of nodes on irregular country extracts. Proposed suggestion could be to force external routnig nodes on every road at crossing of administrative boundary. -- Best regards, Andrzej