I have exactly the same Issue, im using a scandinavien version of O365 and when i try to use AFE i can import Functions from text and URL's but AFE will not sync to Name manager because of my language settings, If i then do replace all Commas"," to Semicolons ";" and then save it again. then everything after the first Semicolon disappears without warning. so for us not using American language Setting the Name manager is still a better option.
This issue should be prioritized and it would be nice if AFE when Importing from Github Gist automatically would identify Origin language setting and convert to the users language setting Automatically
Please solve this fast.