It depends on language that you need,all flashfiles have English so if it is ok with you then flash any FS.
You can use main generic,FS that you need(Western Europe,Central Europe etc.)just don't use Vodafone,T-mobile etc.
You have to use same customization as your FS(language pack)or you will have configuration error.
For example if you will use FS Western Europe then use customization file Western Europe.