Graphs are not localised

In #417, I implemented a partial fix, but because of #418, the graphs are not fully localised. Also, some legends are not localised at all (cf. screenshot). These should be localised.

<img width="176" height="66" alt="Image" src="https://github.com/user-attachments/assets/031d253f-61ad-4325-9590-ffeb231fa10e" />