Sorry, I am not sure about the automatic translation of your question: do you mean auto-correction, where it fixes spelling? Or auto-completion, where it helps you type programming keywords or other terms already found in your document?

The latter is native to the app, described https://npp-user-manual.org/docs/auto-completion/ in the manual , and controlled by the settings described https://npp-user-manual.org/docs/preferences/#auto-completion

Spelling correction is not implemented natively in Notepad++, but the DSpellCheck plugin is highly recommended for doing spell check and suggesting corrections.