Another day, another struggle with JavaFX

Today, I spent about 6 hours and I plan to spend even more on figuring out how to connect EvenHandler with ToggleButtons to change displayed dictionary from English to Welsh and vice-versa. I wasn't able to create a toggle switch so I replaced it with two toggle buttons to change the language and I'm waiting for group approval. I have never used Cell Factory in JavaFX and I'm surprised by the lack of tutorials on the internet. I spend a really long time to find something actually useful. I'm going back to work on customizing cell of the ListView to make it look as desired and specified in UI Presentation.

Edit: Today was the first official online meeting with the tutor and group members. It took about 25minutes.