Hello,
Thanks for contacting us.
Please read this article – https://xstore.helpscoutdocs.com/article/30-base-theme-translation
Download pre-create translation files of the theme – https://www.8theme.com/glotpress/projects/xstore/xstore/ and Core plugin – https://www.8theme.com/glotpress/projects/xstore/xstore-core-plugin/ , upload them on your site, do Sync – https://xstore.helpscoutdocs.com/article/103-translation-files-update and continue translation.
If you need our assistance with it, provide temporary wp-admin access.
Regards