Localisation an Custom Blocks

I'm at a loss. At first, I thought it was because something was wrong with the links in the translations—some texts from the custom blocks are translated, some are not. I have translated 11 languages here, and even though we have invested in localization, I have to maintain everything manually. And even if I maintain the languages manually and translate the text that was not maintained in Chinese into Chinese, it is for example also in Chinese in Polish.

Has anyone else had this problem? How did you solve it?