Is it possible to localize chart?

I wanted to localize names of week days

Map transformation

I’m aware about map transformation. But I want localize week days/month in the chart it’s an image, how to use transformation with chart?

By setting the correct locale for the system the image will be created with the localized names. Like this:

Is possible to change locale only for openhab not for whole system. I set my locale with paper UI

But it doesn’t help

…And because that doesn’t help I posted the link above in which Udo Hartmann showed me how to change the locale for the user openhab on the Linux OS. And no I do not know the correct setting for your language, sorry.