This VQmod extension autocompletes product name for every language, meta tag title and SEO keyword.
First product name written (in any language tab) will fill into every name field in other lang tabs.
The same goes for meta tag titles, the first written title will fill into other empty meta title fields.
SEO keyword will be created from product name by removing non-ascii characters, replacing whitespace etc.
Remember to check your SEO keyword anyway, it might not be right.

Should work on OpenCart versions 2.0.x - 2.1.x.