It is very common to use exposer filters along with the views. By default, Drupal doesn't provide any option to sort out the values shown to a user in an exposed form filter. To overcome this, enable Better Exposed filters and then you will get an option to sort the options shown in the exposed filter.
Whenever working on a multilingual website you must have noticed that views by default start showing all the translations of available nodes in separate rows. This might be a required behaviour sometimes but most of the time it is very confusing for the users and feels like content duplicacy. This can easily be solved by setting 2 additional settings in the views:
1. Add Filter -> Respective Entity (Translation Language) = Content Language Selected for the Page.
2. Rendering Language = Content Language Selected for the Page.
In case you are using relationships as well in the view (and related entities are marked translatable as well), you might have to set a translation language filter for all the entities. Feel free to set different values for these 2 options to achieve the required behaviour.