There is no problem with English (UK) language files, as well as with Serbian (latin) on Primo. I have a problem with Slovenian language (by Janch).

There is also no problem with most recent HERE maps! Only with TomTom 2017.12 and 2018.06. (2018.03 crashes iGO / Primo).

Do you know how to edit / instert proper language code in Slovenian language file (to display city names in Slovenian or at least not localized at all / displayed as in the Country, like Graz, Wien etc. - more or less as Serbian Latin does)? Or, where to find more details about that (how it works, code / language tables etc.)?

Or, is there any setting in some iGO / Primo configuration files to set names in map view to be displayed in local language (Graz, Wien etc. in Austria), not localized (should be Gradec, Dunaj etc. in Slovenian)? That would be OK for me as well.