Polish translation of "words"

[MacKarp]

Hello!
I want to translate missing Polish "words" word but in Polish language plural form(in this context) have 2 variants:
słowa & słów and it depends on number before, how i can achieve this? I have added PR #1148 with most common plural form słów
This is how it should look - pattern after 20 repeats:

• 0 słów
• 1 słowo
• 2 słowa
• 3 słowa
• 4 słowa
• 5 słów
• 6 słów
• ..
• 21 słów
• 22 słowa
• 23 słowa
• 24 słowa
• 25 słów
• 26 słów
• ...