Make strings translatable via Polylang

I use the “Polylang” tool on allsky-rodgau.de to offer the blog in German and English. In addition to the relatively simple creation of translations for blog posts, Polylang also enables the translation of individual text modules in plugins and themes that are not automatically covered by WordPress or theme language files. To do this, strings must be explicitly registered so that they appear in the backend under “String translation” and can be maintained for each language.