Wikidata Senses helps you add Senses to Lexeme items by identifying items in a given language that don't have at least one Sense and showing you one random item at a time.
Glosses are added in the same language as the Lexeme. There's no option to change the language of the gloss (to provide glosses in different languages than the Lexeme itself), and the query that finds Sense-less Lexemes only looks for glosses in the language of the Lexeme. It's a feature.
You can see edits made using this tool on the recent changes list.
You can also look at the code on Github and complain in the Issues there. But if things are broken, I probably already know about them :(