Hi,
I can see that values for activity log are set directly from english(is taking the key?)
for example
Here we can see that value [Received Quantity] is not translated to “Otrzymana ilość”.
this is the place on github where translation is created frappe/frappe/public/js/frappe/form/footer/version_timeline_content_builder.js at e8153fc2b67c92558fd2ac86eb66dbae07cc07fe · frappe/frappe · GitHub
alse we can see that Status is also taken from EN and some of the numebers are not translated like " [Nine Hundred And Thirty Eight only]"