I want to modify the labels of total and subtotal rows

[Masaru_Asano]

By aggregating total and subtotal row labels, you can create insights in a format that meets your needs.

[RADSr · Accepted solution]

I think this gets you there for the total - haven't tried w/ subtotals yet: 

[RADSr]

Just tried subtotal -  works there too!

[Masaru_Asano]

We have confirmed that it can be changed.
Thank you very much for the information!