Some 3D format, problem when importing/exporting process if contains Non-latin

[dgud]

3ds can't be utf-16, if wings expect that all old files will fail to load,
we would get Mojibake for every old-file which uses ascii or utf-8.
3ds Max may use it internally now but that doesn't help with an old file-format that expects ASCII.

The encoding for strings in 3ds, obj and lwo is latin-1/ascii encoded not UTF-8.
You may get it work with UTF-8 because UTF-8 is designed to work for ASCII,
but then you will break Latin-1 encoded files.

Wings could guess on import which encoding was used but that is still just a guess,
and when doing export the only correct way is to encode in Latin-1 for old formats that have not specified the encoding format.

So if you want to use old file-formats stay with ASCII characters, that is the only thing that will work.
If you need to Unicode characters use newer formats with a specified encoding.