Irish language

St Patrick's Day
The Irish language doesn't have words for 'yes' and 'no'.

If you want to answer in the affirmative or negative, you instead need to use the verb form to communicate your response.
 
For example: 
An éisteann Seán lena mháthair riamh? – “Does Seán ever listen to his mother?”

Éisteann – “Yes, he does.” (literally: “Listens.”)

Ní éisteann – “No, he doesn’t.” (literally: “Does not listen.”)

Source: https://www.capitatranslationinterpreting.com/11-little-known-facts-irish-language/