Hi @jaakkokorhonen, one answer is that you need to do this in a sustainable way.
We have done this kind of exercise several times over the years and what happens is that the info gets out of date after a few months or a year. So, we really want to focus on a sustainable way of doing that. Right now this is being worked on – the work @Mor and others are doing on the guidelines is essential prep for this.
For my part, one thing you can do right is contribute to creating the Community Directory:
For example, have all the Finnish OK members got profiles here? Also is there a Finnish Local Groups section under Local Groups (e.g. on Front Page)? If not you can create one:
You could then post this kind of information in your “About topic” for that category.