DeepL API has the ability to let users define how formal or informal the language is. At the moment there is no control through the API from langshop. Would be great to be able to set this as a preference in LangShop - see the documentation below:
https://www.deepl.com/docs-api/translate-text/translate-text/
formality
optional body string
Sets whether the translated text should lean towards formal or informal language. This feature currently only works for target languages DE (German), FR (French), IT (Italian), ES (Spanish), NL (Dutch), PL (Polish), PT-BR and PT-PT (Portuguese), JA (Japanese), and RU (Russian). Setting this parameter with a target language that does not support formality will fail, unless one of the prefer_... options are used. Possible options are:
default (default)
more - for a more formal language
less - for a more informal language
prefer_more - for a more formal language if available, otherwise fallback to default formality
prefer_less - for a more informal language if available, otherwise fallback to default formality
