Problem:
Is there a way to reuse translations in other websites?
Solution:
If you want to save and reuse some of your string translations for other projects, you should save them in a po file. You can manually create this po file with all the strings and their translations and then save it to a mo formatted file to use in your site (uploading it in your theme directory for example), of you can also use WPML>String Translation to export and import the translations from/to po files.
Problem:
How to reduce the storage place of the website by evoiding un upload of duplicated images. Solution:
Use WPML and the Media Translation add-on.
The Media Translation module allows using the same media files in content in different languages. Relevant Documentation: https://wpml.org/documentation/getting-started-guide/media-translation/
