Ability to translate "Log in" page and Calendar Months

Hey, the ability to make Custom Translations is great! But when translating Slovak language into our own Lithuanian language, i noticed that there are some parts missing and is not possible to change them from Slovak.

• The log in page is half Slovak, half English, but it is impossible to change it to a different language.

• The calendar is also impossible to translate. The months are in Slovak, as well as the

  abbreviated days.

I’m attaching screenshots for refference:

Would it be possible to add these words to the custom translation? As now our Lithuanian customers would be greeted with Slovakian log in page