@ Christian,
Please start a new thread, you have added a brand new set of topics to this post , i.e importing, and a page worth of strings in html that is not easily read and it is not showing the info that we need to assist you . We need your plugin environment and site url. The issue reported by the originator of the post will be in next release as identified by Lance.
1) Please provide your PLUGIN environment, a screenshot of the PLUGIN ENVIRONMENT is best. , read posting guidelines to see what info is needed.
2) have you updated SLP to 4.9.1, that should solve the language issue.
3) Please do not post multiple issues in your post
4) Please do not add to someone else’s post as you may not have same plugin environment or configuration or servers or PHP versions etc.