Is PolyLang suitable for my website?

A friend of mine has a small website based on WordPress v5.8. He uses Elementor / Elementor Pro. Everything is in German language. He wants to present the whole contents of his website also in English and Russian. Translation of texts will be done by native speakers, not by automated translation.

We are looking for a (simple) WP plug-in to achieve a multi-language website supporting at least 3 languages (German [standard], English and Russian). The required plug-in should support Elementor and Elemetor Pro, and ideally also Gutenberg (however not mandatory), but we plan to deploy Gutenberg as a replacement for Elementor (Pro) in about 2 years.

The plug-in should provide a language switcher so that visitors can select their desired language. If possible, the WP plug-in should allow for further languages, although currently not required.

For the beginning the WP plug-in should be FREE software and should fulfill the above mentioned requirements. A PRO version is planned later on.

I understand that there is a FREE version of PolyLang. Does the FREE version support all the features mentioned above? (I went through the documentation but could not find clear answers.)

Best regards
Dieter