Both Elementor and Elementor Pro use the language set in the WordPress admin.
Go to WordPress Dashboard > Settings > GeneralSelect your desired language from the dropdown of the Site Language option
Now, your WordPress admin and your Elementor and Elementor Pro frontend and backend will all be in the Site Language you』ve chosen.
Note: It is not possible to run Elementor or Elementor Pro in a different language from the one chosen in the WordPress settings.
Update your site』s translations after each update of Elementor
Updating Elementor does not automatically update the translation. When you switch the language from 」 Settings > General「, this changes the language of Elementor and Elementor Pro as well. But there is an additional step to take.
Go to 「Dashboard > Updates」 and accept the translation of Elementor Pro there by clicking the Update Translations button.
Note: After each update, there may be new strings to translate, so you should check the Dashboard > Updates panel after each Elementor update.
If you are interested in joining the team of localizers so you can help translate Elementor into your language, please read How To Translate Or Localize Elementor