Improve the UX for multi-lingual fields when the organization has multiple languages

**Is your feature request related to a problem? Please describe.**

The current solution for multi-languages fields works well when the organization has 3, 4 or 5 languages, but we'll be working with a client that has a much higher number of languages, and the current solution does no escale

**Describe the solution you'd like**

We propose improving the UX for these fields and we have two suggestions:

1. Use a dropdown per each field. This wouldn't change much of the current behavior, only that locales would be hidden in the dropdown.
2. Use a dropdown for the whole form. On top of each form, show a dropdown that will change the fields shown to use the selected language version. Non-translatable fields will be shown anyway. This implies a bigger change of behavior and more work, dev-wise.

We're not sure about what's the best approach, or if we should find even another approach to this problem.

**Describe alternatives you've considered**

None.

**Additional context**

None.

**Does this issue could impact on users private data?**

No.