Hi @karel ,
You could also use custom fields on the Builder model and query off of those, instead of using targeting. Here is an example of how to use custom fields to query specific entries based off of custom fields: How do I show different content in my development, qa, and production environments using Builder?. The example is for querying different entries based off of an environment field, but you could change that to be called locale and give it the different options that you want to have.