Hi MC
These time intervals don't use tokens. They're stored in an SQL table called QuicktimeInterval in the RTPPM database. There's a Name and Displayname column, you must not change the Name (it's the way the program recognizes it), but you can change the Displayname : it's how it appears in the screen. You will need to write SQL queries to read & update the Displaynames.
Sadly this does mean there is no language-dependent translation. All users will see the same words, no matter which language they use. We have request PSPT-76679 to change the Displayname name system into Tokens for these time intervals, but this change has not been started yet.
I also created this Article and it should get updated if/when the solution changes.
Let us know if that solves your issue.