Make sure you have HACS installed.
If you want to contribute to this please read the Contribution guidelines
If you would like to use the integration in another language, you can help out by providing the necessary translations.
Head over to GitLocalize to start translating.
If your desired language isn't available there, just open an issue to request it.
You can also just do the translations manually in custom_components/komfovent_c5/translations/ and open a pull request with the changes.