Yes, but for a term like “kudos” there are hundreds of text keys that need to be edited. You might consider a script to assist with the change.
...and it's a good thing there are multiple text keys. For example in our forums we changed that text key to "Likes". In our idea exchanges we changed it to "Votes".
Just search for kudos in the text editor and do it in one hit, but review where it will appear according to the descriptor bit of the key as in some places you may like it to appear in plural form etc.
For example: Kudos are Hearts on our community (cancer support). So in some places, it's more appropriate to have it say give "a heart" instead of immediately replacing "kudos" with "heart" than have it say give "heart" or give "hearts" etc.