In cases where more than one language exist in a given territory, having to choose only one location/languages limits the usefulness of results.
For instance, I'm in the Valencian Country in Spain where we speak Catalan and Spanish. If you perform a search in Google it will automatically look for results in both languages and give you one or another according to their relevance for a given search. If I use Kagi (which I have configured as default in Catalan) and look up for a Spanish shop for instance, it will not appear in results as their page is in Spanish.
Therefore, it would be useful to be able to select a secondary region-location for search, specially in countries where we have more than one language.
Selecting more than one language-location in multilingual settings would improve the usefulness of results and avoid having to change language-locations every time you perform a search.
