Problem with TransPosh

There is a problem with Transposh PlugIn in the sitemap link, it not consider the 3 character added for other language (/es) so all the translated page link are wrong. For example

http://casaolimpia.it/en/a.it/wellness-spa/offer-spa-packages-Sicily-Catania-sauna-massage-whirlpool-romantic-weekend

ended of
http://casaolimpia.it/en/wellness-spa/offer-spa-packages-Sicily-Catania-sauna-massage-whirlpool-romantic-weekend

What I can do?

https://ww.wp.xz.cn/plugins/google-sitemap-generator/