Why do some directories appear with quotes and others without?

Question

SSH

Before creating another themes folder and installing the theme in it, this was not the case. What does it mean?
I also attached that there is a similar question, since I asked a question about themes on web-ftp, but no one answered.
-rw-r--r-- 1 mort_ftp0 mort_ftp0 30 Sep 1 20:53 index.php
drwxr-xr-x 3 mort_ftp0 mort_ftp0 4096 Oct 21 08:07 languages
​​drwxr-xr-x 4 mort_ftp0 mort_ftp0 4096 Oct 19 10:33 'languages ​​'
drwxr-xr-x 3 mort_ftp0 mort_ftp0 4096 Sep 1 20:53 'plugins '
drwxr-xr-x 3 mort_ftp0 mort_ftp0 4096 Oct 21 08:06 themes
drwxr-xr-x 5 9 mort_ftp0 0 mort_ftp0 4096 themes '
drwxr-xr-x 2 mort_ftp0 mort_ftp0 4096 Oct 21 08:07 upgrade
drwxr-xr-x 2 mort_ftp0 mort_ftp0 4096 Oct 19 10:33 'upgrade '
drwxr-xr-x 3 mort_ftp0 mort_ftp0 4096 Oct 21 07:41 uploads
drwxr-xr-x 3 mort_ftp0 mort_ftp0 4096 Sep 1 21:48 'uploads'

Answer 1

You have spaces in your folder names. Hence the quotes. The shell tells you that a space is part of the folder name (in your case, a space at the end).

Answer 2

because they are with spaces in the name