Support DeepL formal/informal tone option
Many languages like (French, German, Dutch, etc.) use formal or informal terms of address. DeepL is definitely the best automatic translation option out there and to specify the tone would be a big win. This should require only little effort at POEditor but I am not sure about implications concerning the price.
From the DeepL Website: "Customize your results to use formal or informal terms of address with DeepL Pro."

The Automatic Translation feature now supports DeepL's Formality option: https://poeditor.com/kb/advanced-automatic-translation-options
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Robin commented
From the DeepL API documentation: Requests accept a parameter "formality".
Quote:
Sets whether the translated text should lean towards formal or informal language. This feature currently works for all target languages except "EN" (English), "EN-GB" (British English), "EN-US" (American English), "ES" (Spanish), "JA" (Japanese) and "ZH" (Chinese).
Possible options are:
"default" (default)
"more" - for a more formal language
"less" - for a more informal language