Hi,
it's been a long time since this thread was opened, but anyway, as this is the first context related result I got from Google in 2017, typing the keywords "scribus S fonts", and the solution posted here do not solve my problem, and as I have managed to find out a solution by myself, it may be useful for the next one searching this topic.
I had first installed the fonts I had in bulk in a folder, simply copy&pasting all the subfolders containing each font, into the .fonts folder in my home directory.
I have done this without using the terminal by doing so:
-Pressing Ctrl+H in home, will make visible all hidden folders.The way you tell Linux to create a hidden folder is simply by adding firstly a period to the folder name.
Thus, if you do not see any .fonts folder appear once you type Ctrl+H, you have to create one in your system because this is where all apps will search the fonts.
-Then you copy and paste all the folders containing the fonts in this .fonts folder, BUT from there may be the problem you are experiencing with the S font appearing in Scribus. While it's certainly better to have each font family in a different folder instead of having all the fonts files together pasted in .fonts folder, do not let the font files be located in a sub-sub-sub... folder from the first folder, i.e. do not nest too much the typeface files in order to avoid errors while loading or retrieving them from such deep locations from the system. Some of my typefaces, have been readed correctly by scribus even if they were located in a sub-sub-folder but for the two concerned by this issue, I solved it by allowing only to be present in a sub-folder of the .fonts folder as for example in my case:
/.fonts/AntiquaTorunska/ALL THE FILES OF ANTIQUA TORUNSKA(BOLD, LIGHT BOLD, ETC.)
