Conflicts between street names

Hee hoi!

I’ve encountered a few streets in grunn with conflicting street names between OSM and the real life street signs. For example ‘Hoogstraat’ and ‘Hoogstraatje’, or another example ‘Westindischekade’ and ‘West-Indischekade’.

I was wondering what would be the proper procedure in dealing with this differences, and how come this conflicts hasn’t being fixed for months or even years in some cases.