Multi-line labels for long labels in chord diagram

I am making this chord diagram in an R shiny app. The labels are very unruly and distract from the figure a lot. I attempted to fix this by making the labels multi-line. I added \n characters every 25 characters to the labels. This plot below is the result. I guess since this is being rendered in javascript, it ignores my \n characters and still just puts the label on one line.

I would love it if you would add this functionality to allow me to label this plot how I want. As I'm following a specific set of guidelines/naming conventions, I would like to avoid changing the actual text in my labels.